Asked by Sello

A man with a mass of 80KG stands on a bathroom scale on the floor of a lift. Determine the reading of the scale if the lift is at freefall.

Answers

Answered by Damon
F = m a
F up from scale - m g = m a
but a = -g (free fall)
so
F up from scale - m g = - mg
so
F up from scale = 0
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