A man weighing 160 lb stands on the floor of an elevator. What force will be exerted on floor if it (i) descends with a uniform acceleration of 1 ft/sec 2 (pi) ascends with a uniform acceleration of 1 ft/sec 2

(a) When elevator descends weight will be 155.026 lb

(b) When elevator ascends weight will be 164.954 lb    

Explanation:

It is given weight of man on the floor of elevator F = 160 lb

Acceleration due to gravity

At the floor of elevator weight is equal to

So

m =

(ii) When the elevator descends with uniform acceleration

Weight will be equal to  

(ii) When elevator is moving upward

Weight is equal to

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