1.What is the kinetic energy of an object with a velocity of 7m / s and a mass of 14kg
2. What is the kinetic energy of an object with a velocity of 5m / s and a mass of 5kg
Helppppp!

Answers

Answer 1

Answer:

Explanation:

The formula for KE is

[tex]KE=\frac{1}{2}mv^2[/tex] and we fill in to solve for KE:

[tex]KE=\frac{1}{2}(14)(7.0)^2[/tex] I used 2 significant digits in the velocity because 1 isn't accurate enough. Therefore, my answer will be rounded to 2 sig fig's:

KE = 340 J (rounded from 343). And we do the exact same thing in #2:

[tex]KE=\frac{1}{2}(5.0)(5.0)^2[/tex] (Used 2sig fig's for both the mass and the velocity) to get

KE = 63 J (rounded from 62.5)


Related Questions

Dimas reads that it takes 270 N to lift a firefighter's equipment. If a firefighter does 5400 J of work carrying the equipment up a staircase, how high does the firefighter climb? (Work: W = Fd) 20 m 200 m 5130 m 1,458,000 m

Answers

Answer:

h = 20 m

Explanation:

Given that,

Force to lift a firefighter's equipment, F = 270 N

Work done, W = 5400 J

We need to find the height climbed by the firefighter. We know that,

Work done, W = Fd

So,

[tex]d=\dfrac{W}{F}\\\\d=\dfrac{5400}{270}\\\\d=20\ m[/tex]

So, the firefighter climb from a height of 20 m.

Answer:

Its A

Explanation: I got it right on Edge *lip bite*

A tow truck pulls a 7,800 N car 5m out of a ditch in 6.5 seconds. How much power does the
tow truck have?

Answers

Answer:

p=6000W

Explanation:

p=w/t

w=f*d=7800*5=39000 J

therefore,

p=39000/6.5=6000 W

Answer:

p=6000W

Explanation:

There are some ways objects in motion are affected. _______________, or pushes and pulls, affect the motion of an object. _______________ is a force that pulls objects down to Earth. _______________ is a force that slows things down or can even make them stop. Did you know acceleration means more than the increase of an object’s speed? It also describes an object that is slowing down or changing _______________. Since acceleration is a change in speed or direction, that means, _______________ is a change in velocity

Answers

Answer:

Forces, Gravity, Friction, Direction, Acceleration.

The answers for the fill-in-the-blanks would be  Force, gravity friction

direction and acceleration respectively.

What is gravity?

It can be defined as the force by which a body attracts another body towards its center as the result of the gravitational pull of one body and another,

There are a few ways that moving objects are impacted. Pushes and pulls, or force, have an impact on how an object moves.

The force of gravity drags items toward the Earth.

Friction is a force that causes objects to move more slowly or even come to a stop.

It also applies to an item that is reversing course or slowing down. Since acceleration is a change in velocity, it can also be a change in speed or direction.

Thus, Force, gravity friction direction, and acceleration are the answers respectively.

Learn more about gravity from here,

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Un automóvil de 14.500 kg es acelerado gracias a la fuerza de su motor, la que le imprime 21.750 N. Calcular la aceleración del auto.

Answers

Ben Ben Ben Ben Ben ven ven ven

An aircraft is moving horizontally with a speed of 50m/s, at the height of 2km, an object is dropped from the aircraft. What is the vertical and horizontal velocity of an object if the angle is 23 degrees and the time interval for the object hits the ground?

Answers

Explanation:

use the diagram^

horizontal velocity of the object nvr changes, it'll stay 50m/s till it hits the ground

initial vertical velocity = 0

to find the final vertical velocity, use the formula:

[tex]v {}^{2} = u {}^{2} + 2as[/tex]

where u = 0m/s, a = 9.8m/s², and s = 2000m

solve for v.

for time taken to reach ground, use the formula:

[tex]v = u + at[/tex]

where v = the value for v u calculated above, u = 0 m/s, a = 9.8m/s² and solve for t.

Q1) Calculate the gravitational force between two large trucks, each with a mass of 6500 kg, if
they are parked next to each other separated by a distance of 0.5 m Ignore all other
gravitational forces.

Answers

Answer:

F = 0.0112 N

Explanation:

Given that,

Masses, [tex]m_1=m_2=6500\ kg[/tex]

The distance between masses, d = 0.5 m

We need to find the gravitational force between two large trucks. The formula for the gravitational forces is given by :

[tex]F=G\dfrac{m^2}{r^2}\\\\F=6.67\times 10^{-11}\times \dfrac{6500^2}{(0.5)^2}\\\\F=0.0112\ N[/tex]

So, the required force between masses is equal to 0.0112 N.

Choose the correct answer?

Answers

Answer:

B

Explanation:

Someone please help me figure this out

Answers

Answer:

the answer is A

Explanation:

hope this helps you will u plz mark me sa brainliest?

What cell organelle stores water for plant cells is it a Large Vacuole or small

Answers

Answer:

plant cell's vacuole can make up 90% of the cell's volume. The large central vacuole essentially stores water. In animal cells, vacuoles are much smaller

Which is the correct answer

Answers

Answer: E

Explanation: I looked it up and it said E.

IF ITS RIGHT YOU WILL GET 5 STARS AND A BRAINLY WITH A LIKE

Answers

Answer:

DNA IS SMALLEST

NUCLEUS IS BIGGEST

PLEASE MARK BAiniRINIiEST

how much force is required to accelerate a 50 kg mass at 2 m/s

Answers

Answer:

F = 100 Newtons

Explanation:

F = ma

F = (50 kg)(2 m/s)

F = 100 kg*m/s

Increasing the force acting on an object increases its acceleration.
a. TRUE
b. FALSE

Answers

TRUEefffffffffffffffffffffffffffff

Explanation:

The density of red wood is 15.27 g/cm'. A piece of red wood has the volume of 18.721 cm', what is the
mass?

Answers

The mass is 285.86967 GIV BRAINDEADLIEST

Which has a higher momentum, a 3.5kg bowling ball that is rolling at 30
m/s or a 50 kg student moving at 1.75 m/s?

Answers

Answer:

The answer of this question

Explanation:

a3.5 kg blowing ball that is rolling at 30 m/s

A student shakes a rope such that 20 complete vibrations are made in 4.00 seconds. Determine the vibrational frequency of the rope, along with the corresponding unit.

Answers

Answer:

The vibrational frequency of the rope is 5 Hz.

Explanation:

Given;

number of complete oscillation of the rope, n = 20

time taken to make the oscillations, t = 4.00 s

The vibrational frequency of the rope is calculated as follows;

[tex]Frequency = \frac{number \ of \ complete \ vibrations}{time \ taken} \\\\Frequency = \frac{20 }{4 \ s} \\\\Frequency = 5 \ Hz[/tex]

Therefore, the vibrational frequency of the rope is 5 Hz.

What would happen to the two balls if one of them were kept positively charged and the charge on the other ball were slowly increased, making it more and more positive? View Available Hint(s) What would happen to the two balls if one of them were kept positively charged and the charge on the other ball were slowly increased, making it more and more positive? The balls would begin to move closer together. The balls would not move relative to each other. The balls would begin to move farther apart.

Answers

Answer:

the balls would move closer to each other

Explanation:

GIVING BRAINLIEST PLEASE HELP!!
-if you answer correctly ill give you brainliest which will give you 25pts-

Answers

Answer:

D. Wind

Explanation:

Wind is Basically nothing how can you even use wind again when you cant even touch it you can only feel wind.

A and B I think IM POSITIVE about A


14. A light bulb has a resistance of 8 ohms and a maximum current of 10 A How much voltage can
be applied before the bulb will break?

Answers

Answer:

80 volts.

Explanation:

From the question,

Applying Ohm's law

V = IR...................... Equation 1

Where V = Voltage, I = maximum current of the bulb, R = Resistance of the bulb.

Given: I = 10 A, R = ohms

Substitute these values into equation 1

V = 10×8

V = 80 volt.

Hence the voltage that can be applied is 80 volt.

HELP
Which type of wave interaction is shown in the photo?
A. Interference
B. Refraction
C. Reflection
D. Diffraction

Answers

Answer: the answer is c (think bc im on that too)

Explanation:

The interference is a  type of wave interaction shown in the photo. Option A is correct.

What is the interference of waves?

The result of two or more wave trains flowing in opposite directions on a crossing or coinciding pathways. This phenomenon is known as the interference of waves.

The effect is the sum of the individual wave amplitudes at each site where more than one wave is present.

When two wave pulses are traveling along a string toward each other. They meet and the phenomenon is occur known as interference.

The interference is a  type of wave interaction shown in the photo

Hence option A is correct.

To learn more about the interference of waves refer to the link;

brainly.com/question/16098226

Blue-ray disc accelerates from rest to a constant rotational speed of 466 rpm, it rotates through an angular displacement of 0.250 rev. What is the angular acceleration of the CD?

Answers

Answer:

[tex]\alpha =434312\ rev/s^2[/tex]

Explanation:

Given that,

Initial angular speed, [tex]\omega_i=0[/tex]

Final angular speed, [tex]\omega_f=466\ rpm[/tex]

Angular displacement, [tex]\theta=0.25\ rev[/tex]

We need to find the angular acceleration of the CD. Using third equation of rotational kinematics as follows :

[tex]\omega_f^2-\omega_i^2=2\alpha \theta\\\\\alpha =\dfrac{\omega_f^2-\omega_i^2}{2\theta}\\\\\alpha =\dfrac{466^2-0^2}{2\times 0.25}\\\\\alpha =434312\ rev/s^2[/tex]

So, the angular acceleration of the CD is equal to [tex]434312\ rev/s^2[/tex].

(please help i gotta turn this in a few minutes 10 points!)

Match the planet to its description.


1.
Mercury


2.
Venus


3.
Mars


4.
Earth
a.
Iron oxide causes the red color of its soil
b.
Has the hottest recorded surface temperatures of the solar system
c.
Liquid water covers more than 70% of its surface
d.
Is a rocky planet with extreme temperature changes

Answers

Answer:

3a, 2b,4c,1d

Explanation:

what do I need to explain just something you know

1. Define speed

2. Define velocity

3. What is the formula for average speed and velocity

4. What are the three main units of measurement for speed?

5. What is acceleration on a distance time graph

6. What is speed on a distance time graph

7. What is no motion on a distance time graph

8. Define average speed

9. Give an example of velocity units

10. Describe velocity on a distance time graph

11. Give three examples of acceleration

12. Give an example of acceleration units

sorry it says some physics it doesn't give me science as a subject choice​

Answers

Answer:

1. speed is the distance travelled by an object in unit time

2. velocity is the displacement of a body in in unit time

3. formula of speed =total distance (d)÷ total elapsed time

Ligaments are important because they provide joints with:
A lubrication.
B cushioning.
C stability.
D flexibility

Answers

Answer:

the answer is B. it's too easy

You cannot classify matter based on chemical properties. true or false?

Answers

Answer:

ture i think

Explanation:

It is false that one cannot classify matter based on chemical properties.

What is a matter?

Matter is the scientific term for any type of material. Matter is defined as anything with mass that occupies space.

Matter requires at least one subatomic particle, though most matter is made up of atoms. A pure substance is sometimes referred to as matter.

Solids, liquids, and gases are the three forms or phases of matter. A substance is defined as matter that is homogeneous and has identical parts.

Substances are classified as either elements or compounds. Elements are pure substances that cannot be chemically decomposed into simpler substances.

Chemically, matter can be classified as pure substance elements and compounds, mixture, or impure substance.

Thus, the given statement is false.

For more details regarding matter, visit:

https://brainly.com/question/10893210

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Amy pulls a spring with a spring constant k = 100 stretching it from its rest length of 0.10 m to 0.2

Answers

Answer:

Elastic potential energy  E = 0.5 J

Explanation:

Let us assume we have to find the elastic potential energy stored in the spring.

Given: k = 100

change in the length of the spring x = 0.2-0.1 = 0.1 m

Elastic potential energy

E = [tex]\frac{1}{2} kx^2[/tex]

plugging the values we get

[tex]E = 0.5\times100\times0.1^2\\=0.5 J[/tex]

Hence, Elastic potential energy  E = 0.5 J

Amy pulls a spring with a spring constant k = 100 N/m, stretching it from its rest length of 0.10 m to 0.20 m.

What is the elastic potential energy stored in the spring?

Answer: 0.5 J

An object moves from point A to B to C to D and finally to A
along the circle shown in the figure below.
a) Find the distance covered by the moving object.
b) Find the magnitude of the displacement of the object.

Answers

Answer:

a) The distance covered by the moving object is approximately 18.85 km

b) The magnitude of the displacement of the object is 0 (no displacement)

Explanation:

From the drawing, we have;

The sale of the drawing is 1 unit = 1 km

The radius of the circle in the drawing along which the object moves = 3 units

Therefore;

The radius of the circle along which the object moves, r = 1 km/unit × 3 units = 3 km

a) The distance covered by the object that moves from point A to B to C to D and finally to A is equal to the circumference of the circle

Therefore;

The distance covered by the moving object, d = 2·π·r

By pugging the value for r = 3 km

d = 2 × π × 3 km = 6·π km ≈ 18.85 km

The distance covered by the moving object, d ≈ 18.85 km

b) The displacement = The object's change in position

The initial position of the object = Point A

The final position of the object = Point A

Therefore, the displacement of the object, A = No displacement = 0 (No difference between the initial and final location of the object

true or false? Most forces occur in pairs, such as when
you push against the floor with your
feet, the floor pushes back on your feet,
but there are a few exceptions where a
single force can occur without being in
an interaction of two forces.

Answers

This is TRUE everything has a action the force from your feet pushes and the floor pushes back

According to our textbook, we now have over __ billion people living on our planet

Answers

it’s 7 billion people living

How is a plant able to cycle matter through the processes of cellular respiration and photosynthesis?

Answers

The carbon cycle refers to the processes by which carbon in the biosphere is recycled. Photosynthesis sucks carbon dioxide out of the atmosphere, while cellular respiration releases it into the environment. Photosynthesis is the process by which solar energy reaches a plant and is converted into glucose.

How photosynthesis and cellular respiration are similar:

Photosynthesis is a method by which plants and other organisms transform light energy into chemical energy, which is then released to fuel the organism's metabolic activities through cellular respiration.

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