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

Jeffrey Piggott
Quiz by Jeffrey Piggott, updated more than 1 year ago
Jeffrey Piggott
Created by Jeffrey Piggott almost 3 years ago
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Quiz on force-time graphs and impulse for Cambridge AS Level Physics.

Resource summary

Question 1

Question
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.
Answer
  • I only.
  • II only.
  • III only.
  • I and II.

Question 2

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

Question 3

Question
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
Answer
  • b > c > d > a > e
  • b > c > a > d > e
  • b > a > c > d > e
  • Each slope is straight so the impulse applied to the box during each of the intervals is zero.

Question 4

Question
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?
Answer
  • 100 kg m/s
  • 250 kg m/s
  • 300 kg m/s
  • 500 kg m/s

Question 5

Question
For the collision shown ahttps://www.goconqr.com/assets/icons/image-plus-md.pngt the left, the impulse on the 6 kg sphere is:
Answer
  • 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.
  • five times the magnitude, but opposite in direction compared to the impulse on the 30 kg sphere.
  • zero.

Question 6

Question
For the collision shown, what is the speed of the 30 kg sphere immediately after the collision?
Answer
  • 0 m/s
  • 10 m/s
  • 50 m/s
  • 100 m/s

Question 7

Question
For the collision , how do the magnitudes of change in momentum and change in velocity compare for the two objects?
Answer
  • The 6 kg object has a greater magnitude of momentum change and a greater magnitude of velocity change.
  • 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 same 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.
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