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Jeffrey Piggott
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Quiz on force-time graphs and impulse for Cambridge AS Level Physics.

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Jeffrey Piggott
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AS Level Physics U4 Dynamics : Force-Time Graphs & Impulse Quiz

AS Level Physics U4 Dynamics : Force-Time Graphs & Impulse Quiz

Question 1 of 7 Question 1 of 7

1

A 10-kg box, initially at rest, moves along a frictionless horizontal surface. A horizontal force to the right is applied to the box. The magnitude of the force changes as a function of time as shown.

Which of the following impulse calculations is correct?

I. The impulse for the period from 0 to 2 seconds is 4 Ns.
II. The impulse for the period from 2 to 5 seconds is 6 Ns.
III. The impulse for the period from 5 to 8 seconds is Ns.

Select one of the following:

  • III only.

  • I only.

  • II only.

  • I and II.

Explanation

Question 2 of 7 Question 2 of 7

1

A 10-kg box, initially at rest, moves along a frictionless horizontal surface. A horizontal force to the right is applied to the box. The magnitude of the force changes as a function of time is shown in the top graph.
A student draws the bottom graph for the momentum of this 10-kg box as a function of time during this 10-second interval.
Which statements describe what is correct about the second graph and/or describe changes that could be made to correct the graph? Select two answers.

Select one or more of the following:

  • From 0 – 2 seconds, the graph should be curved downward and from 5 – 8 seconds, the graph should be curved upward.

  • The graph is correct between 0 – 2 seconds and 5 – 8 seconds.

  • The graph is correct between 2 – 5 seconds and 8 – 10 seconds.

  • From 0 – 2 seconds, the graph should be curved upward and from 5 – 8 seconds, the graph should be curved downward.

Explanation

Question 3 of 7 Question 3 of 7

1

A 10-kg box, initially at rest, moves along a frictionless horizontal surface. A horizontal force to the right is applied to the box. The magnitude of the force changes as a function of time as shown.

Rank the impulse (greatest to least) applied to the box by this force during each 2-second interval indicated below:
a. 0 to 2 s

b. 2 to 4 s

c. 4 to 6 s

d. 6 to 8 s

e. 8 to 10 s

Select one of the following:

  • b > c > a > d > e

  • b > c > d > a > e

  • b > a > c > d > e

  • Each slope is straight so the impulse applied to the box during each of the intervals is zero.

Explanation

Question 4 of 7 Question 4 of 7

1

A 6 kg sphere collides with a stationary 30 kg sphere on a frictionless and horizontal surface at t = 0 s as shown below.
A plot of the force exerted on the 30 kg sphere by the 6 kg sphere as a function of time is also shown.

What is the impulse applied to the 30 kg sphere?

Select one of the following:

  • 500 kg m/s

  • 250 kg m/s

  • 300 kg m/s

  • 100 kg m/s

Explanation

Question 5 of 7 Question 5 of 7

1

For the collision shown ahttps://www.goconqr.com/assets/icons/image-plus-md.pngt the left, the impulse on the 6 kg sphere is:

Select one of the following:

  • the same magnitude, but opposite in direction compared to the impulse on the 30 kg sphere.

  • the same magnitude and direction compared to the impulse on the 30 kg sphere.

  • zero.

  • five times the magnitude, but opposite in direction compared to the impulse on the 30 kg sphere.

Explanation

Question 6 of 7 Question 6 of 7

1

For the collision shown, what is the speed of the 30 kg sphere immediately after the collision?

Select one of the following:

  • 10 m/s

  • 0 m/s

  • 50 m/s

  • 100 m/s

Explanation

Question 7 of 7 Question 7 of 7

1

For the collision , how do the magnitudes of change in momentum and change in velocity compare for the two objects?

Select one of the following:

  • The two objects have the same magnitude of momentum change, and the 30 kg object has greater magnitude of velocity change.

  • The two objects have the same magnitude of momentum change, and the 6 kg object has greater magnitude of velocity change.

  • The two objects have the same magnitude of momentum change, and the same magnitude of velocity change.

  • The 6 kg object has a greater magnitude of momentum change and a greater magnitude of velocity change.

Explanation

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