Momentum, Impulse and Collision

Which of the following is a vector quantity?

• Speed
• Momentum

• Mass
• Velocity

What is the formula for momentum?

• p = mv
• p = m^2v
• p = Fv
• p = ma

When two objects collide, the total momentum before the collision is ___________ the total momentum after the collision.

• equal to
• opposite to
• less than
• greater than

What is the unit of momentum?

• m/s^2
• kg*m
• kg*m/s
• m*kg/s

Which of the following statements about impulse is true?

• Impulse is only applicable to stationary objects.
• Impulse is equal to the force applied multiplied by the time over which the force is applied.
• Impulse is equal to the distance traveled by an object.
• Impulse is independent of the time over which the force is applied.

What is the unit of impulse?

• Watt-seconds (Ws)
• Newton-seconds (Ns) or kilogram-meters per second (kg·m/s)
• Kilowatt-hours (kWh)
• Joules per second (J/s)

A 2 kg object is moving at a velocity of 4 m/s. What is its momentum?

• 8 kg*m/s
• 3 kg*m/s
• 10 kg*m/s
• 6 kg*m/s

The law of conservation of momentum states that in the absence of external forces, the total momentum of a system

• remains constant
• stays the same
• decreases
• increases

Which type of collision involves objects sticking together after the collision and move as a single mass.?

• Inelastic collision
• Superelastic collision
• Perfectly inelastic collision
• Elastic collision

What is the magnitude of the impulse experienced by an object when a force of 10 N is applied for 5 seconds?

• 50 Ns
• 15 Ns
• 40 Ns
• 25 Ns