A Shopping Centre has escalators to move people between different floors. They also have lifts
which the people can use.
A man of mass 78 kg steps on the escalator which lifts him to a height of 10m. It took 2 min to
reach that height. If he had used the lift, it would have taken 90s to reach the same height.
(g=10N/kg)
a) Calculate the Gravitational potential energy gained by the man when he reaches the
height of 10m.
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a man of the mass him hai answer of the acre 52 and speaker
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