1. The mass of a toy car is 1 kg and it is initially at rest. If a constant force of 5 Newtons is applied to it for 2 seconds, what is the change in its linear momentum?

2. If two people of the same weight are trying to turn a nut using wrenches. Person 1 uses a shorter wrench while person 2 is using a longer wrench, which of the following statements is true?

a. Person 1 will exert a greater torque because they are stronger.

b. Person 2 will exert a greater torque because they are using a longer wrench.

c. Person 1 will exert a greater torque because they are using a shorter wrench.

d. Person 2 will exert a greater torque because they are using a shorter wrench

3. Consider a collision between two pucks on a frictionless air hockey table. Puck A has a mass of 390 g and an initial velocity of 2.7 m/s in the +x direction. Puck B has a mass of 550 g and is initially at rest. After the collision, puck A has been deflected by 30 degrees and has a speed of 1.9 m/s. What is the speed and direction of puck B after the collision?

4. Which of the following scenarios demonstrates the conservation of angular momentum?

a. A figure skater spins faster by pulling their arms closer to their body.

b. A spinning top slows down and eventually stops on its own.

c. A rotating bicycle wheel wobbles and changes its axis of rotation.

d. A diver tucks into a tight somersault during a dive from a platform.

5. Disk 1 and Disk 2 both have the same mass and radius and they are both rotating about their central axes. Disk 2 has most of its mass concentrated near the outer edge, while Disk 1 has most of its mass concentrated near the center. Which of the following statements is true regarding the moment of inertia of these two disks?

a. Disk 2 has a smaller moment of inertia than Disk 1.

b. Disk 2 has a larger moment of inertia than Disk 1.

c. Disk 1 and Disk 2 have the same moment of inertia.

d. The moment of inertia of a solid disk does not depend on the mass distribution.

6. A given force of F is applied to a rod in several different ways. The rods in each case are the same and are pivoted about the same point, P. Define counterclockwise as positive and assume ?30. Rank the torques about the pivot point P for each scenario from highest to lowest. Explain why you ranked them in this way (or show work).

A C F F P P D P F F P P P