A 30.6 kg crate initially at rest on a horizontal floor requires a 100 N 30° with the horizontal force to set it in motion. Find the coefficient of static friction between the crate and the floor

Answers

Answer 1

The frictional force opposes the forward motion of the crate. The coefficient of static friction is 0.2.

Using the formula;

Fa = - Ff + mgsinθ

but Ff = μsFN and N = mgcosθ

Hence;

Fa = mgsinθ - μsmgcosθ

μsmgcosθ = mgsinθ - Fa

μk =  mgsinθ - Fa/mgcosθ

μk =  coefficient of static friction = ?

Fa = horizontal force = 100N

m = mass = 30.6 kg

θ = angle = 30°

g = acceleration due to gravity = 10 m/s^2

Substituting values;

μk =  [(30.6 × 10) sin 30°] - 100 / (30.6 kg × 10) cos 30°

μk = 153 - 100/265

μk = 0.2

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Related Questions

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Answer:

As a capacitor is charging it takes up charging current and there's significant drop of current as the voltage increases in the capacitor.

Thus, D is the correct option.

2nd qn,

A is the correct option. Since points B, C and D are points of interaction and the force can be experienced at intervals while at A the forces will be balanced.

Which of the following is not part of the forces that work together to move the tectonic plates?

-mantle convection
-ridge push
-slab pull
-friction

Answers

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Acceleration due to gravity on the moon is 1.6 m/s2. If a person has a mass of 65 kg on Earth, what is their weight on the moon? 

Answers

Answer:

10.75 kg

Explanation:

moon = (weight on earth/9.81m/s^2)*1.622m/s^2

Answer:

weight of the moon = mass × gravity

= 65kg × 1•6

=104N/kg

Isaac attempts to kick a field goal from the 40 yard line. He kicks the football at 38 m/s at a 50° angle above horizontal. If the football reaches the goal post at 3/4 of the horizontal distance kicked, then will it be high enough to cross the goal post that is 3.66 m high?
Please help asap!

Answers

Answer: Solution In photo

3. There is a thin layer of water between the blade and the ice. Suggest how this affects friction and helps the skater? . ​

Answers

Explanation:

Underneath the blade of skates, there is a thin layer of water from the melted ice. ... This water then acts as a lubricant (something whose purpose is decreasing friction), resulting in a smooth motion of the skates over the ice.

1. a conductor carries a current that is decreasing exponentially with time. the current is modeled as where is the current at time and is the time constant. how much charge flows through the conductor between and ?

Answers

Explanation:

what is the colour of our blood

Answer:

Q = Q0exp -t/RC

Explanation:

Q0 initial chage

RC time constant

t time

Describe what happens when there is no Friction and you stop pushing on that object?



Describe what happens when there is Friction and you stop pushing on an object?


Are your answers to questions 1 and 2 the same? Why or why not? What causes that to be the same or different?

I give Brainliest!

Answers

Answer: see below

Explanation:

1) An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Friction opposes relative motion. In its absence, a moving object will not stop.

2) If you stop pushing, the force of kinetic friction will produce an acceleration in the opposite direction of the velocity, and the object will slow down and stop.

3) No they are not the same, as one has friction and the other has no friction.

how long does it take the star and planet to complete one orbit around their center of mass?

Answers

Answer:

i think about 225-250 million years

Explanation:

Bottom line: The planets in our solar system orbit (revolve) around the sun, and the sun orbits (revolves) around the center of the Milky Way galaxy. We take about 225-250 million years to revolve once around the galaxy's center. This length of time is called a cosmic year.

Which type of graph would best show the data collected from measuring time for a ball to fall from varying heights?

bar graph

scatter plot

Frequency table

circle graph



This is due tonight, can someone pls help me ASAP, TYSM.

Answers

Scatter plot, because it has a wide rage

Velocity:
How far would a bird travel if it is flying south for the winter at 5m/s for 1 week

Answers

Answer:

Birds in migration can travel as far as 16,000 miles. To reach their destination in time, some travel at speeds of 30mph.

How far has a ball traveled after 3.6 seconds when thrown downward at a
velocity 3.75 m/s?

Answers

ball traveled 13.5 m/s after 3.6 seconds

Explanation:

u=3.75m/s, t=3.6s, g=9.8m/s².

Therefore, according to the formula,

S=ut+½gt².

S=(3.75×3.6)+½×9.8×(3.6)²

S= 13.5+63.504

S= 77.004m (approximately 77 m)

therefore the distance traveled by the ball is 77m.

hope this helps you

CAN U PLS CHECK IF IT CORRECT I'LL MARK YOU BRAINLIST

Answers

Answer:

l think that the answer is 10.hope this helps . Can you mark me the brainest pliz.lt's LAURA RAYS AMIRA.

Answer:

Explanation:

700-40 = 760

760/10 = 76

It will take her 76 days to finish the book

What type of forces are needed in a system for the object to move?​

Answers

Answer:

they are

Explanation:

1.Frictional force

2.Applied force

3.Normal force

Three astronauts guide a 100 kg asteroid safely away from their space capsule. The first astronaut pushes with a 35 N force directed 45 degrees below the x-axis. The second astronaut pushes with a 35 N force directed 45 degrees above the -axis. The third astronaut pushes with a 35 N force along the x-axis. Calculate the magnitude of the net force exerted by the three astronauts. Calculate the rate (magnitude only) at which the asteroid's velocity changes.

Answers

The magnitude of the net force exerted by the three astronauts is 84.5 N and the rate at which the asteroid's velocity changes is 0.845 m/s².

The given parameters;

mass of the asteroid = 100 kgforce by first astronaut = 35 N, at 45 degrees below x -axisforce by second astronaut = 35 N, at 45 degrees above x-axisforce by third  astronaut = 35 N, at 0 degrees on x-axis

The resultant horizontal force applied by the three astronauts on the asteroid is calculated as;

Fₓ = 35cos(45) + 35cos(45) + 35cos(0)

Fₓ = 84.5 N

The rate at which the asteroid's velocity changes is calculated as;

[tex]F = ma = m\frac{\Delta v}{\Delta t} \\\\\frac{\Delta v}{\Delta t} = \frac{F}{m} \\\\\frac{\Delta v}{\Delta t} = \frac{84.5}{100} \\\\\frac{\Delta v}{\Delta t} = 0.845 \ m/s^2[/tex]

Thus, the magnitude of the net force exerted by the three astronauts is 84.5 N and the rate at which the asteroid's velocity changes is 0.845 m/s².

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If a truck weighs 195,000N what is the mass of the truck

Answers

Answer:

19500kg

Explanation:

If you divide 195000N by 10

What is the quantity that is the same for all masses?

Answers

Answer:

mass: The quantity of matter which a body contains, irrespective of its bulk or volume. It is one of four fundamental properties of matter. It is measured in kilograms in the SI system of measurement.

Explanation:

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The ______ describes the number of wavelengths that pass through a fixed point in a given period.

Answers

Answer:

frequency

Explanation:

Frequency refers to the number of waves that pass a given point in a given time period and is often expressed in terms of hertz (Hz), or cycles per second. Longer wavelengths will have lower frequencies, and shorter wavelengths will have higher frequencies ([link])

Answer: Frequency



Step by step Explanation:

A ball of mass 0.50 kg was thrown directly up at a speed of 6.0m/s.Calculate. A.its kinetic energy at 6ms^-1b.its maximum gain of potential energy. C.its maximum height gain.​

Answers

ヘ(。□°)ヘヘ(。□°)ヘヘ(。□°)ヘヘ(。□°)ヘヘ(。□°)ヘ

A) Its kinetic energy be 9.0 Joule.

B)  Its maximum gain of potential energy is 9.0 Joule.

C) Its maximum gain in height be 1.91 m.

What is speed?

Speed is distance travelled by the object per unit time. Due to having no direction and only having magnitude, speed is a scalar quantity With SI unit meter/second.

Given parameters:

Mass of the ball: m = 0.50 kg.

Initial speed of the ball: v = 6.0 m/s.

A) its kinetic energy at initial = 1/2mv² = 1/2 × 0.50 × 6.0² Joule  = 9.0 Joule.

B) As total energy is conserved., when the ball reaches its maximum height its initial kinetic energy fully transforms into potential energy. Its maximum gain of potential energy is  its kinetic energy, that is, 9.0 Joule.

C)  Its maximum gain in height be = √(v²/2g) = √(6.0²/2×9.8) m = 1.91 m.

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A 700 g block is released from rest at height h0 above a vertical spring with spring constant k ! 400 N/m and negligible mass. The block sticks to the spring and momentarily stops after compressing the spring 19.0 cm. How much work is done (a) by the block on the spring and (b) by the spring on the block

Answers

The work done by the block on the spring and by the spring on the block is 7.22 J.

The given parameters;

mass of the block, m = 0.7 kgspring constant, k = 400 N/mextension of the spring, x = 19 cm = 0.19 m

Based on law of conservation of energy, the potential energy of the block will be converted to elastic energy of the spring, producing the given extension.

The work done by the block on the spring will be equal to work done on the block by the spring.

[tex]W = \frac{1}{2} kx^2\\\\W = \frac{1}{2} \times 400 \times 0.19^2\\\\ W = 7.22 \ J[/tex]

Thus, the work done by the block on the spring and by the spring on the block is 7.22 J.

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the energy stored in chemical bonds *

Answers

Answer:

Chemical energy (Also considered potential energy)

Explanation:

If a male runner in the fourth starting position ran the 400 m race in 44.40 s, how would you
calculate his average speed?

Answers

V=d/t=>v=400m/44.40s=>v=9m/s

If a male runner in the fourth starting position ran the 400 m race in 44.40 s, then for calculating his average speed we have to divide the total distance covered by the time taken by him to cover the distance.

His average speed would be 9.0 meters/second.

What is speed?

The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object. The unit of speed is a meter/second. The generally considered unit for speed is a meter per second.

The mathematical expression for speed is given by

speed = total distance /Total time

If a male runner in the fourth starting position completed the 400 m race in 44.40 s, we must divide the total distance traveled by the amount of time it took him to complete the course to get his average pace.

the average speed of the runner = 400 meters/44.40 seconds

                                                       = 9.0 meters/second

Thus, his average speed.be his average speed would be 9.0 meters per second

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INQUIRY LAB
HOW DO You Breathe?
Use and manipulate an improvised breathing apparatus similar to the
one shown at the right in answering the following questions:

Pull down the string attached to the center Of the large balloon.
1.What happened to the two small balloons attached to the capillary tube?
2.When the large balloon is not yet stretched or pulled down, how do the two small balloo
appear?
3.How does the improvised breathing apparatus simulate the breathing process?

plss can u help me with thiss its realy a lot of help THANK YOU SO MUCHH

Answers

Answer:

u breathe lol nice ok bro

Please help I'll mark brainliest NO LINKS

Answers

Answer:

D

Explanation:

I had the question on an exam, I answered D and I got 97% on the test, I got it correct with the answer of D. TO be fair I guessed on the test and got it right, lucky guess I suppose.

Answer:

According to electrostatic concept the electric potential will be toward the negative charge and the coulomb force will be directed towards the negative charge.

Due to that 4 is the correct option.

That's what I think, all the best!

the circuit contains a filament bulb, connected with ........ to a ........

fill in the blanks.​

Answers

Answer:

The circuit contains a filament bulb, connected with terminal to a terminal.

Explanation:

The base of the electric bulb and the metal tip of the base are the two terminals of the bulb. One is called a positive terminal while the other is called a negative terminal. The filament of the electric bulb is connected to its terminals.

1 thing you learned about your culture that you did not know



Answers

Answer: That There are diffrent names for my skin color

Explanation:

If a 2kg block of copper is heated and a temperature increase of 50C is measured, how much energy has been provided?

Answers

Answer:

...................

saya gk tau

An Eider duck is flying Northeast at 25 m/s at an angle of 36.9 degrees to the ground (from the positive
X-axis). What are the horizontal and vertical velocities, respectively, of the duck's flight?

Answers

Answer:

Horizontal = 19.99212 m/s     Vertical = 15.0151 m/s

Explanation:

Horizontal = Cos(36.9) x 25

Vertical = Sin(36.9) x 25

what is needed to know in a physics exam?

Answers

Answer:

Review what you have done for that unit. Skim over it if you dont have enough time because it would greatly help. If you have mathamatics involved learn or make sure you are perfect at doing the equations you need to do. Just dont cheat because if you get caught you are going to get an imediete F which will be worse then getting half of them wrong. Good luck


5 . W h ic h o f th e fo l lo w in g is N O T a fu n d a m e n ta l S .I u n it? A . M e te r B . A m p e re C . K e lv in D . Radian

Answers

Explanation:

it is an AMPERE

because 1 AMPERE = CHARGE / TIME

WHICH INVOLVES 2 UNITS

If you pull on a car with 200N of force, what does Newton’s 3rd Law says will happen?

Answers

When the force of 200N is being exerted, the road the car is being driven on will exert an equal force in the opposite direction on the car.
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Summarize the function of apoptosis in the cell cycle.(1 point)to destroy damaged or old cellsto destroy damaged or old cellsto facilitate cell reproduction before the cell cycle restartsto facilitate cell reproduction before the cell cycle restartsto allow the cell to rest before the cell cycle restartsto allow the cell to rest before the cell cycle restartsto repair damaged or old cellsto repair damaged or old cells *PLEASE ANSWER THESE ADDITIONAL QUESTIONS , I WILL GIVE BRAINLIEST*1. Which of the following acts was passed to help fund the Union's war efforts during the American Civil War? (1 point)a.) Michigan Act of 1837b.) Specie Circular of 1836c.) National Banking Act of 1863d.) Deposit and Distribution Act of 18362. Which of the following policies was implemented in the Banking Acts of 1863 and 1864 to discourage state banks from competing with the newly-chartered national banks? (1 point)a.) State banks were abolished.b.) National banks were given higher capital requirements.c.) Taxes were levied on national banks.d.) Taxes were levied on state banks.3. Which of the following reflects the decentralization that occurred throughout the U.S. banking system in the mid-1800s?(1 point)a.) The national currency of the United States was established.b.) The number of independent state banks increased dramatically.c.) The number of national banks increased dramatically.d.) The first and second central banks of the United States were chartered.4. Which of the following difficulties would Andrew Jackson have faced in implementing his preferred currency of gold and silver coin?(1 point)a.) The First National Bank only printed 20 percent of the country's currency, limiting the money supply.b.) U.S. gold and silver mines were too numerous under Jackson's presidency and would contribute to an uncontrollable money supply.c.) 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The preference of savers to spend their income in the current period rather than delay their consumption until some future period.3. The risks associated with the investment4. Expected inflationConsider the following statements that address these factors, and indicate if you think each statement is true or false.a. On average and everything else held constant, consumers prefer deferred consumption spending to immediate spending. On average and everything else held constant, an investment that can provide a 4% return should attract more investment capital from savers/investors than an otherwise identical investment that can generate a 12% return. b. An investment that can provide a 10% return should attract more investment capital than an otherwise identical investment that can only provide a 6% return. c. On average and everything else held constant, 30-year U.S. Treasury bonds should expect to exhibit a smaller maturity premium than a 1-year U.S. Treasury bill. d. 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