January 31, 2015

Homework Help: Physics

Posted by Trinh on Wednesday, October 19, 2011 at 6:59pm.

How much kinetic energy does a 1 kg ball have if it has a velocity of 10 m/s?
a. 100 J.
b. 50 J.
c. 10 J.
d. 5 J.

A ping pong ball and a golf ball move with the same kinetic energy. Which is moving fastest? (golf balls are heavier than ping pong balls).
a. The ping pong ball is moving faster than the golf ball.

When a ball is dropped which of the following is true?
a. Kinetic energy is converted into potential energy.
b. Potential energy is converted kinetic energy.
c. Potential energy remains constant.
d. Kinetic energy remains constant.

b. The ping pong ball is moving slower than the golf ball.
c. The ping pong ball and the golf ball move with equal speeds.

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