A labourer raises a load of bricks weighing 20 kg through a height of 5m what is the increase in the potential energy of the bricks.
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Answer:
Explanation:
Work = Force * Distance
(I’m using an asterisk to denote multiplication)
Force (in Newtons) exerted by a mass m is: F = m * g
(assuming we are on Earth, that is)
where g is the acceleration due to gravity, 9.81 m/s^2
Therefore Work = Mass * g * Distance
= 20 * 9.81 * 5
=980 Joules
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