Momentum

With what constant velocity does an object of mass 5kg move if its momentum is 10kg⋅m/s?

• 10m/s

• 5m/s

• 2m/s

• 4m/s

• 50m/s

An elevator is initially moving with a velocity of 5m/s in the vertical direction with a momentum of 5000kg⋅m/s. If the elevator starts to slow down so its momentum decreases to 2000kg⋅m/s, then the final velocity of the elevator equals m/s.

• 2

• 5

• 3

• 1

A rocket of mass 500000kg is moving with a velocity of 3400m/s. Its momentum is kg⋅m/s. Give your answer in scientific notation to one decimal place.

• 1.5×10^2

• 5.0×10^5

• 6.8×10^-3

• 1.7×10^9

If the mass of an object is doubled and its velocity is decreased to half its former value, what happens to its momentum?

• It increases four times.

• It stays the same.

• It decreases to half its former value.

• It doubles.

How many times greater is the momentum of a 1,500kg mass hippo moving at 0.25m/s than a 75g mass bird flying at 10m/s?

• 50

• 100

• 250

• 500

• 1,000

What is the momentum of an object that has a mass of 2kg and moves at a constant velocity of 3m/s?

• 12kg⋅m/s

• 3kg⋅m/s

• 9kg⋅m/s

• 6kg⋅m/s

• 18kg⋅m/s

What is the mass of an object that moves at a constant velocity of 2.2m/s if its momentum is 3.3kg⋅m/s?

• 2kg

• 1kg

• 1.5kg

• 1.4kg

• 3kg

A child of mass 30kg slides down a slide. Near the top of the slide, the child’s velocity is 0.65m/s, while near the bottom of the slide, the child’s velocity is 1.35m/s. How much does the child’s momentum change between these two positions?

• 19.5kg⋅m/s

• 60kg⋅m/s

• 30kg⋅m/s

• 40.5kg⋅m/s

• 21kg⋅m/s

A cricket ball of mass 160g has a constant velocity of 10m/s. A golf ball of mass 40g has the same velocity as the cricket ball. What velocity change must the cricket ball undergo to have the same momentum as the golf ball?

• -15m/s

• -9.975m/s

• -6m/s

• -9.75m/s

• -7.5m/s

The graph shows the change in momentum of an object as its velocity changes. What is the mass of the object?

• 7kg

• 2.5kg

• 6kg

• 7.5kg

• 5kg