Momentum

1.    Which of the following describes momentum?

• The amount of matter in an object.

• The force needed to stop an object.

• The resistance of an object to motion.

• The product of an object's mass and velocity.

2. What happens to an object’s momentum if its velocity doubles?

• It doubles

• It disappears

• It is cut in half

• It stays the same

3. A child jumps off a small boat onto a dock. What happens to the boat?

• It moves forward

• It stays in place

• It moves sideways

• It moves backward

4. A soccer player wants to increase the momentum of the ball when kicking it. What should they do?

• Use a lighter ball

• Kick with more force

• Decrease the velocity of the ball

• Reduce the time of contact with the ball

5. In a car crash, airbags reduce injuries by increasing the time it takes for a person to stop.

Why does this help?

• It makes the person stop instantly.

• It removes the need for seat belts.

• It reduces the force on the person.

• It increases the person's momentum.