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April 19, 2014

Homework Help: physics

Posted by y912f on Monday, February 16, 2009 at 8:35pm.

please check my answers

what are the SI units for momentum?

kg*m/s

which of the following is not involved in hitting a tennis ball?

a. kinetic energy
b. chemical potential energy
c. gravitational potential energy
d. elastic potential energy

i picked B

How much power is required to lift a 2.0 kg mass at a speed of 2.0 m/s?

4.0 J?

i'm not sure about the last one..thanks for checking:)

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