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A 75kg man stands in a lift. What force ...

A 75kg man stands in a lift. What force does the floor exert on him when the elevator starts moving upward with an acceleration of `2 ms^(-2)` Given: g = `10 ms^(-2)`.

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R-mg =ma , R= mg + ma = m(g+a)
`=75(10 + 2) N = 900N`
` =(900)/(10)` kg wt. = 90 kg. wt
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