# Energy Mini Quiz

4 Questions

Energy mini quiz.

• 1.
Two pool balls, each moving at 2 m/s, roll toward each other and collide. Suppose after bouncing apart, each moves at 4 m/s. This collision violates conservation of
• A.

Momentum

• B.

Energy

• C.

Both a & b

• D.

Neither of these

• E.

Both c & d

• 2.
In a pendulum, if the KE decreases
• A.

The PE is increased

• B.

The PE is constant

• C.

Friction will stop the decrease of KE

• D.

PE always equals the force

• 3.
When an object is lifted 10m, it gains a certain amount of PE. If the same object is lifted 20m, its potential energy gain is
• A.

Less

• B.

The same

• C.

Twice as much

• D.

Four times as much

• E.

More than 4 times a smuch

• 4.
If object A travels at 5 m/s, and object B has the same mass but travels twice as fast. How much more KE will the second object have?
• A.

2 times as much

• B.

4 times as much

• C.

6 times as much

• D.

3 times as much

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