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- 1. Multiple Choice
A student conducts an experiment in which a cart is pulled by a variable applied force during a 2 s time interval. In trial 1, the student exerts the force on a cart of mass M. In trial 2, the student exerts the force on a cart of mass 3M. In trial 3, the student exerts the force on a cart of 5M. In which trial will the cart experience the greatest change in momentum from 0 s to 2 s?
Trial 1
Trial 2
Trial 3
The change in momentum is equal for all three trials from 0 s to 2 s
- 2. Multiple Choice
A block of mass of 10 kg travels in the positive direction along a surface with negligible friction. The block has an initial momentum 18kg⋅ms. The block collides with an object of an unknown mass that is at rest. The force exerted on the block as a function of time is shown on the graph. Which of the following best predicts the speed and direction of the block immediately after the collision?
Speed - Increases Direction - Same Direction
Speed - Decreases Direction - Same Direction
Speed - Increases Direction - Opposite Direction
Speed - Decreases Direction - Opposite Direction
- 3. Multiple Choice
A force is applied to a 2 kg object as shown. Which of the following are possible values for its initial and final velocities?
- 4. Multiple Choice
A cart is attached to a hanging block by a string that passes over a pulley, as shown in the figure. The pulley has negligible friction in its axle and negligible mass. A student must determine the change in momentum of the cart as it is pulled across the horizontal surface from the moment the cart is released from rest to the moment immediately before the cart collides with the pulley. Which of the following lists the measuring devices that are needed to determine the change in momentum of the cart?
Timer
Timer and mass balance
Timer, mass balance, and meterstick
Timer, mass balance, meterstick, and force probe
- 5. Multiple Choice
During an experiment, a toy car accelerates forward for a total time of 5s. Which of the following procedures could a student use to determine the average net force exerted on the car during the 5s that the car accelerates?
Use a meterstick and stopwatch to measure the distance the car travels for the 5s.
Use a balance to determine the mass of the car. Use a motion sensor to measure the speed of the car at a time of 0s and a time of 5s.
Use a balance to determine the mass of the car. Use a meterstick to measure the distance the car travels for the 5s.
Use a motion sensor to measure the speed of the car at a time of 0s and a time of 5s. Use a meterstick to determine the distance the car travels for 5s.
- 6. Multiple Choice
A motorcycle and car are both out of gas. The car has twice the mass of the motorcycle. After Waluigi pushes the motorcycle and car for the same amount of time with the same force, what can you say about the momentum and speed of the motorcycle and the car?
They have the same momentum and the same velocity.
The motorcycle has more momentum and a higher velocity than the car.
The car has more momentum and higher velocity than the motorcycle.
They have the same momentum, but the motorcycle has a higher velocity than the car.
- 7. Multiple Choice
Two carts of equal mass are on a horizontal surface with negligible friction. Cart A is approaching cart B, which is at rest, as shown in Figure 1 above. Attached to cart B is a spring that is initially compressed. At the moment cart A collides with cart B, the spring is released and pushes on cart A, as shown in Figure 2 above. Which of the following correctly states what happens to the kinetic energy and the momentum of the two-cart system as a result of the collision compared to those quantities before the collision?
KE - Increases Momentum - Increases
KE - Increases Momentum - Stays the same
KE - Stays the same Momentum - Increases
KE - Stays the same Momentum - Stays the same
- 8. Multiple Choice
Cart A has mass 2M and is released from rest at a height H on a ramp that makes an angle with the horizontal, as shown above. Cart B has mass M and is released from rest at a height H on ramp making an angle with the horizontal. The carts roll towards each other and have a head-on perfectly inelastic collision. Indicate what the two cars will do after they collide.
Remain at rest
Move to the left
Move to the right
¯\_(ツ)_/¯
- 9. Multiple Choice
An archer tests various arrowheads by shooting arrows at a pumpkin that is suspended from a tree branch by a rope, as shown to the right. When struck head-on by the arrow, the pumpkin swings upward on the rope. The arrow can be embedded in the pumpkin, pass through the pumpkin, or bounce off the pumpkin. In which case does the pumpkin have the greatest resulting velocity to the right?
Embedded arrow
Pass arrow
Bounce arrow
¯\_(ツ)_/¯
- 10. Multiple Choice
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- 11. Multiple Choice
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- 12. Multiple Choice
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- 14. Multiple Choice
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