Question text
18 A mass is raised vertically. In time t, the increase in its gravitational potential energy is E and the p increase in its kinetic energy is E . k What is the average power input to the mass? (cid:2) E E E +E p k p k A (E – E )t B (E + E )t C D p k p k t t
18 A mass is raised vertically. In time t, the increase in its gravitational potential energy is E and the
p
increase in its kinetic energy is E .
k
What is the average power input to the mass?
(cid:2)
E E E +E
p k p k
A (E – E )t B (E + E )t C D
p k p k t t
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