a) What is gravitational potential energy? Write the expression for the gravitational
potential energy.
b) Write the factors affecting the amount of work done.
c) Define 1 joule of work.
d) Find the increase in kinetic energy of a body of mass 700 g, when its speed increases
from 2 ms-1
to 4 ms-1
(answer the questions fast and give right answer ok )
.
Answers
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0
Answer:
The gravitational potential energy of a body at a height is measured by the amount of work done in moving it up to that height against the force of gravity acting on the body. The expression used for gravitational potential energy is mgh. h = height from the ground.
Answered by
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Answer:
If the object is lifted straight up at constant speed, then the force needed to lift it is equal to its weight mg. The work done on the mass is then W = Fd = mgh. We define this to be the gravitational potential energy (PEg) put into (or gained by) the object-Earth system.
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