The position- time graph of an object gives the velocity of the object. If the graph shows a horizontal line along the x axis, the object is stationary.
What is velocity?Velocity of an object is a physical quantity measuring the distance covered per unit time. It is a vector quantity and thus have a magnitude and direction. Velocity is thus, the ratio of change in distance to the change in time.
v = dx/dt.
A moving object is always associated with certain velocity. Which can be constant or changing. The plot of position v/s time gives the change in position with respect to time. Thus, velocity can be calculated from this.
If the position -time graph shows a horizontal line means there is no change in distance with time and the velocity of the object is zero. Thus, the object is stationary or at rest.
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Multi-Select Question
On Earth an astronaut weighs 980 Newtons (about 220 pounds) and has a mass of 100
kilograms. On the Moon, the same astronaut weighs 162.2 Newtons (about 37 pounds).
(Select 2 of 5 Answers)
What is the mass of this astronaut on the Moon, and what is the acceleration acting on the
astronaut's body when she is standing on the Earth?
MULITPLE CHOICE
Not enough information to solve
Mass on the Moon: 37 kilograms
Acceleration on Earth: 9.8 m/s/5
Acceleration on Earth: 1.6 m/s/s
Mass on the Moon: 100 kilograms
Answer:
Correct Options :
Acceleration on Earth: 1.6 m/s
Mass on the Moon: 100 kg
Comprehension Questions:
1. True or false: even when your
research does not support your
hypothesis, the hypothesis has value.
0)
True
O False
No
Determine how many Altuves you could travel in a day if you were moving at 45.000 mph all day. Altuve = 1.65 m
Answer:
The answer is below
Explanation:
Speed is the ratio of total distance traveled to the total time taken. It is given by the formula:
Speed = Distance / time taken
Given that the speed = The polynomial 45.000 mph.
In a day there are 24 hours, hence, the distance traveled is:
Speed = Distance / time taken
45 mph = Distance / 24 hours
Distance = 45 mph × 24 h = 1080 miles
But 1 mile = 1609.34 m
1080 miles = [tex]1080\ miles*\frac{1609.34 \ m}{1\ miles}=1738092\ m[/tex]
Given that Altuve = 1.65 m
Hence, the number of Altuve traveled = 1738092 m / 1.65 m = 1053389
1053389 Altuves was traveled
How many ways (directions) can an object move in 1 Dimension? Can it be still? Can it speed up or slow down?
Explanation:
Let's assume the 1D is along x - axis.
Then, the object can move in two directions, along +x axis or - x axis, depending upon reference point .
Yes, it can be still, speed up and slow down.
8
An airplane flies 8000 m in 30 seconds. Calculate the velocity of the airplane. U
(10 Points)
O 0.27 m/s
16 m/s
267 m/s
24,000 m/s
Answer:
267
Explanation:
8000/30= 266.666666667
or 267 rounded to the nearest whole
Which property of an object is the result of gravity?
O A. Weight
B. Mass
O C. Velocity
OD. Volume
Answer:
it's (A) weight I think
Answer:
A. Weight
Explanation: Weight is defined as the amount of force placed on an object from gravity which means it is directly reliant on the force of gravity while the other choices are not. Neither Mass, volume, or velocity is impacted by gravity as much as weight, velocity is the direction of speed, mass is the resistance that a body of matter offers to a change in its speed or position upon the application of a force, and volume is the amount of space an object takes. As you can see none of these componant have gravity as a determining factor other than weight since weight is determined by the gravity which is why the weight of an object can vary if your on earth or on the moon since the gravity is different.
the unit of energy is derived unit. ( give reasons)
Answer:
Because it is made by two different unit force (F) and displacement(s)
Suppose you take a trip that covers 240 km and takes 3 hours to make. Your average speed is?
80 km/hr
30 km/hr
60 km/hr
240 km/hr
540 km/hr
Answer:
80km/h hope this helps
Answer:80 km/h
Explanation:
Speed =distance/time
On what factors does the quantity of heat of an object depend?
Explanation:
This quantity is known as the specific heat capacity (or simply, the specific heat), which is the heat capacity per unit mass of a material. Experiments show that the transferred heat depends on three factors: (1) The change in temperature, (2) the mass of the system, and (3) the substance and phase of the substance.
a woman drops a rock from a bridge to the water 17.5 m below. with what speed does the rock strike the water?
a. 0 m/s
b. 18.5 m/s
c. 171m/s
d. 9.8 m/s
e. 17.5 m/s
Given :
Height from which rock is dropped, h = 17.5 m.
Initial velocity, u = 0 m/s.
To Find :
Speed does the rock strike the water.
Solution :
We know, by equation of motion :
[tex]v^2-u^2=2as[/tex] ......( 1 )
Here , a = g = 9.8 m/s² ( Acceleration due to gravity )
Putting all given values in 1 , we get :
[tex]v^2-u^2=2as\\\\v=\sqrt{2gh}\\\\v=\sqrt{2\times 9.8\times 17.5}\ m/s\\\\v=18.5\ m/s[/tex]
Therefore, speed with rock strike the water is 18.5 m/s.
Hence, this is the required solution.
A bus traveling at 25.2mi/h speeds up at a constant rate of 9.2x10^-3 m/s^2. What velocity does it reach 25min later?
Answer: actually to solve this u must know what 3.2m/s2 is..do u know it ??...wel let me tell...3.2m/s2 means that in every second the speed of the body increases by 3.2m/s..so if it acts for 6.8 seconds..increase in speed will be 3.2*6.8 however note that this is the increase in speed.. have to change this in km/hr & add this to the initial speed(27km/hr) to get the answer....hope this has cleared ur doubts....
Explanation:
PLEASE HELP!!!
A group of friends are doing some archery.
When Brian fully stretches the bow, it stores 10 J of energy.
Describe the energy transfer that occurs as Brian stretches the bow.
[2 marks]
Answer: potential to kinetic/mechanical
Explanation:
When Brian fully stretches the bow, it stores 10 J of energy. The energy transfer that occurs as Brian stretches the bow will be from the potential energy to the kinetic energy.
What is the law of conservation of energy?According to the Law of Conservation of Energy, energy can neither be created nor destroyed, but it can be transferred from one form to another.
The total energy is the sum of all the energies present in the system. The potential energy in a system is due to its position in the system.
In the above problem, the potential energy gets converted into kinetic energy at the expense of the loss of gravitational potential energy between the two positions.
Friends are practicing archery together. The bow holds 10 J of energy when Brian stretches it to its maximum length. As Brian extends the bow, energy will go from the potential energy to the kinetic energy.
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In a paragraph, contrast the characteristics between anorexia and bulimia
Answer:
Anorexia disease is a disease where you eat to little and you exercise for long periods of time. They feel over weight when they are actually underweight. They weight themselves and restrict the food they eat. People with anorexia die from starvation. Bulimia disease is when people eat too much food. They do forced vomiting, excessive use of laxatives or diuretics, fasting, excessive exercise, or a combination of these behaviors. They have normal weight.
Explanation:
Cuts are ________, meaning an injury to the skin and the soft tissue underneath it.
A. contusions
B. lacerations
C. abrasions
D. bruises
Answer:
lacerations
Explanation:
Answer:
B. lacerations
Explanation:
A P E X!
What is the IMA of the following pulley system?
Answer:
5
Explanation:
Can some one help please i’m in danger !
Distance = Speed × Time
Answer:Level 1:The distance travelled during 5 hours = 0 × 5 = 0 km
Level 2:The distance travelled during 5 hours = 50 × 5 = 250 km
Level 3:The distance travelled during 5 hours = 60 × 5 = 300 km
Level 4:The distance travelled during 5 hours = 60 × 4 = 240 km
WHO IS GOOD AT PHYSICAL SCIENCE PLS COME HERE AND HELP ME OUT!!!!
What is the difference berween uniform velocity and non uniform velocity
Answer:
Uniform Velocity means in a certain limit a body is moving with same speed. And non- uniform Velocity happens when body is moving with different speed.
Explanation:
Answer:
Uniform Velocity means in a certain limit a body is moving with same speed. And non- uniform Velocity happens when body is moving with different speed.
Explanation:
The property of matter that describes what it is made of
Answer:
Miixture
Explanation:
The answer is mixture
An object of mass 30 kg is in free fall in a vacuum where there is no air resistance. Determine the acceleration of the object. F= ?
Answer:
In free fall, mass is not relevant and there's no air resistance, so the acceleration the object is experimenting will be equal to the gravity exerted. If the object is falling on our planet, the value of gravity is approximately 9.81ms2 .
The density of water is 1.00 g/mL. This means if a rock has a density of 0.87 g/mL, it will ____in water.
a) float
b) sink
Answer:
Float
Explanation:
It is given that,
The density of water is 1 g/mL
The density of a rock is 0.87 g/mL
It can be seen that the density of water is more than that of rock. The density of an object is calculated from its mass and volume.
If the density of liquid in which it is placed, is more that that of the object, it will float at the top.
Hence, in this case the rock will float.
An engineering team has come to the stage in the engineering design
process in which it is iterating to improve the solution. What is one thing they
might be doing?
A. Identifying different sets of criteria and constraints to use for each
possible solution
B. Choosing one solution to model out of many possible solutions
the team has identified
C. Identifying the limits on how the prototype can be used to solve
the engineering problem
D. Making improvements to the original prototype in order to perform
more tests
Answer:
D. Making improvements to the original prototype in order to perform
more tests
Explanation:
just did it
The one thing that they might do is making improvements to the original prototype in order to perform more tests. Thus option D is correct.
What is prototype?Prototype is defined as a type of early version, or initial release of a product created to test a theory or procedure.
It can be defined as a test procedure where design teams put concepts into concrete forms, whether they be paper or digital.
It can also be defined as a useful tool for the creation of new products. It provides the creative with the opportunity to watch their concept come to fruition.
There are three basic rule of prototyping.
Inquire as to who will gain.Fail frequently and early.Use show and ask instead of show and tell.When the EGL system code does not have access to the function itself, a function prototype definition is used to provide type checking on function calls.
Thus, the one thing that they might do is making improvements to the original prototype in order to perform more tests. Thus option D is correct.
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A little girl riding a train rolls a ball toward the back of the train at 1.25 m/s NE. The train is traveling at a velocity of 13.22 m/s SW. The little girl's brother runs from the back of the train, toward the rolling ball at a velocity of 1.45 m/s SW. Relative to the little girl's brother, what is the velocity of the rolling ball?
Answer:
Answer: 2.70m/s NE
Explanation:
Just did it.
Please help me on this position-time graph assignment!!!
[tex]\text{Hello there! :)}[/tex]
[tex]\text{The velocity is essentially the slope of the graph in a position vs. time graph, so:}[/tex]
[tex]\text{Given: From 0 - 8 sec, velocity of 10 m/s.}\\\\\text{From 8 - 18 sec, velocity of -5 m/s. (In opposite direction because of the negative sign)}\\\\\\\text{From 18 - 22 sec, velocity of 0 m/s. (Object at rest)}\\\\\text{From 22 - 24 sec, velocity of 5 m/s.}\\\\\text{Graph the position vs. time graph using the velocities as the slope of the line }[/tex]
What is the unit of pressure? Why is it called a derived unit?
Why has SI system
Answer:
pascal
Explanation:
its obtained after either division or multiplication
What is the mass of a person that weighs 500 N on earth?
Answer:
M=51kg
Explanation:
Weight= Mass x Gravitational Acceleration
500N= M x 9.8 m/s^2
M= 51 kg
Joe walked 1200m East and then turned and walked 600m West. Which statement is true about Joe’s walk
Answer:
which statement is true about his walk? he walked 1200m then went back 600m
Explanation:
because he walked 1200m east the 600m west so it adds up to 600
can someone explain what is electric energy???
The energy produce by electricity is known as electric energy.
Answer:
Electrical energy is energy derived from electrical potential energy or kinetic energy
Explanation:
when used loosely ,electrical energy refers to energy that has been converted from potential energy.
using the following choice identify the choice that the best describe homeostasis.
1-maintaining internal balance
2-energy
3-unequal distribution
4-diffusion
Answer:
maintaining internal balance
Explanation:
this question is in biology not physics
Which of the following is not a way to make exercising on a cold day safer?
A. Wear gloves and thick socks.
B. Dress in several layers instead of wearing one bulky garment for warmth.
C. Drink hot tea during your workout.
D. Wear a synthetic or wool hat.
I NEED HELP ASAP FIRST ANSWER GETS BRAINLIEST
Answer:
D.
Explanation:
I think its D. because Tea during a cold workout isnt safe at all. Drinking tea while working out adds weight and you just simply dont need tea when working out.. Hope this helps man :)
C. You shouldn't exercise while drinking hot tea because you can spill it and burn yourself especially while on a treadmill.
If this helped please mark me as brainliest!
[tex]\left[\begin{array}{ccc}Thanks,\\JustSomeIdiot\end{array}\right][/tex]