Physics energy questions?

Posted on 2014-12-11 06:36:00 in Physics by AERO

1. The constant value for the speed of light (c) si 3 x 10^8 m/sec. What is the mass equivalent of 100,000 N-m of energy?

2. A 10 kg mass is lifted to a height of 2 m.

a. What is its weight?
b. What is its potential energy at that height?
c. How much work is done in lifting the mass? (neglect friction)

3. A rock with a weight of 156.8 N falls 5 m. What potential energy does it have just before the end of its fall?

4. How many joules of energy are produced when 1/1000 kg of mass is changed into energy?

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