Final, Pt 2 of 2

Front

What happens to the momentum of an object when its speed is doubled?

Back

The momentum doubles.

Front

A swimmer with a mass of 75kg dives off a raft with a mass of 500kg. If the swimmer's speed is 4m/s immediately after leaving the raft, what is the speed of the raft?

Back

0.6 m/s

Front

What does the law of conservation of energy state?

Back

Energy CANNOT be created or destroyed, only transformed.

Front

Which bowling ball has LESS kinetic energy: one moving at 8 m/s or one at 10 m/s?

Back

The bowling ball moving at 8 m/s has less kinetic energy.

Front

At which point in a pendulum's swing is kinetic energy highest?

Back

At point 3.

Front

Define momentum in physics.

Back

Momentum is the product of an object's mass and its velocity.

Front

What is the formula for calculating kinetic energy?

Back

Kinetic Energy (KE) = 1/2 mv², where m is mass and v is velocity.

Front

Explain the concept of conservation of momentum.

Back

In a closed system, the total momentum before an event is equal to the total momentum after the event.

Front

What is the relationship between mass and kinetic energy?

Back

Kinetic energy increases with mass; if mass increases while velocity remains constant, kinetic energy increases.

Front

How does speed affect kinetic energy?

Back

Kinetic energy increases with the square of the speed; if speed doubles, kinetic energy increases by a factor of four.