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(a) A person of mass 'm' is standing in a lift. Find his apparent weight when the lift is(i) Moving upward with uniform acceleration 'a'.(ii) Moving downward with uniform acceleration 'a' (< g).(iii) falls freely.(b) Explain why, it is easier to pull a lawn mover than to push it. |
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Answer» a) i)When lift is moving up, R-mg=ma R=m(a+g)ii)When lift is moving down, mg-R=ma R=m(g-a)iii)When lift is falling FREELY, a=g R=m(g-g) =0 ie, the body is weightless.b) Taking equation R=m(g-a) into account, The normal reaction(force) is GREATER when we pull a LAWN. Please mark it brainliest |
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