IMPULSE AND MOMENTUM
1. The momentum change of an object is equal to the ______________.
a. force acting on it c. impulse acting on it
b. velocity change of the object d. force acting on it times its velocity
2. Which of the following is the correct description of momentum?
a. The product of force and time c. The change in velocity per unit time
b. The product of force and distance d. The product of mass and velocity
3. Which has more momentum, a large truck moving at 30 km/h or a small truck moving at 30 km/h?
a. large truck b. small truck c. Both have the same momentum.
4. Which of the following has momentum?
a. A rock on top of a cliff c. A parked car
b. A rolling ball d. a hanging chandelier
5. Consider the mass and velocity values of Objects A and B below. Compared to Object B, Object A has ____ the momentum. a. two times c. four times b. one-half d. one-fourth
6. A car possesses 20 000 units of momentum. What would be the car's new momentum if its velocity was doubled?
a. increased 4 times c. increased 2 time
b. decreased 4 times d. decreased 2 times
7. If you have the control over a moving object that is sure to collide with another object, which of the following should you do to lessen the impact of collision?
A. Decrease the momentum of the object over a short time
B. Increase the momentum of the object over a short time
C. Decrease the momentum of the object over a long time
D. Increase the momentum of the object over a long time
8. Most street barriers are made of hard rubber or plastic materials that easily give in or dent when hit. Why is this so?
A. To reduce the vehicle’s kinetic energy when it collides with the barriers
B. To store potential energy in the bumpers of vehicles
C. To reduce the impact force when hit by a vehicle
D. To reduce the impact time when the barriers hit the vehicle
9. What is the momentum of a 20 kilogram cart moving