Momentum Quiz

Which is a unit of momentum?
1. 1 kg-m/s**2
2. 1 N-m/s
3. 1 N-m/s^2
4. 1 kg-m/s
Which object has the greatest momentum?
1. 12-kg mass moving at 1 m/sec
2. 4-kg mass moving at 4 m/sec
3. 5-kg mass moving at 1 m/sec
4. 9-kg mass moving at 3 m/sec
A 5.0 newton force impacts an impulse of 15 Newton-seconds to an object. The force acted on the object for a period of
1. 75 s
2. 10. s
3. 3 s
4. 20. s
An object traveling at 4.0 m/s has a momentum of 16 kg*m/s. What is the mass of the object ?
1. 64 kg
2. 20 kg
3. 12 kg
4. 4.0 kg
A 1.0 kg mass changes speed from 2.0 m/s to 5.0 m/s. The change in the object's momentum is
1. 9.0 kg*m/s
2. 21 kg*m/s
3. 3.0 kg*m/s
4. 29 kg*m/s
A 20 kg mass moving at a speed of 3.0 m/s is stopped by a constant force of 15 N. How many seconds must the force act on the mass to stop it?
1. 0.20 s
2. 1.3 s
3. 5.0 s
4. 4.0 s
A net force of 12 N acting north on an object for 4.0 s will produce an impulse of
1. 48 kg*m/s north
2. 48 kg*m/s south
3. 3.0 kg*m/s north
4. 3.0 kg*m/s south
A 5.0 kg cart moving at a velocity of 4.0 m/s is brought to a stop in 2.0 s. The magnitude of the average force used to stop the cart is
1. 20. N
2. 2.0 N
3. 10. N
4. 4.0 N
A force of 10. N acts on an object for 0.010 s. What force, acting on the object for 0.050 s, would produce the same impulse?
1. 10. N
2. 1.0 N
3. 5.0 N
4. 2.0 N
A constant unbalanced force of friction acts on a 15.0 kg mass moving at 10.0 m/s. If the mass is brought to rest in 1.50 s, what is the magnitude of the force of friction ?
1. 10.0 N
2. 100. N
3. 150. N
4. 147 N