Question

1- During a collision, a 2000-kg car experiences an impulse of 317 N·s.  What is the change in momentum of the car?

2- A 0.8-kg object is in a collision where it experiences a -6.2 N·s impulse.  If the initial velocity of the object was -1.6 m/s, what will the final velocity of the object be after the collision?

3- A uniform rod has a pivot point at its center. A mass of 0.19-kg is hung 0.15 m from the pivot on one side of the rod. On the other side of the pivot, a 0.48-kg mass is hung. How far from the pivot will the second mass need to be placed for the rod to be balanced?

4- A wheel is rotationally accelerated at a rate of 0.8 rev/s². If the wheel was initially at 0 rev/s and was accelerated for 3.8 s, what would its final rotational velocity be?

5- A net torque of 6 N·m is acting on a rod that is being rotated about its tip. The rod is 1.31 m long and has a mass of 1.1 kg. What is the rotational acceleration of the rod?

Answer 1