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Q.

The force exerted by the floor of an elevator on the foot of a person standing there is more than the weight of the person if the elevator is 

a) going up and slowing down 

b) going up and speeding up 

c) going down and slowing down 

d) going down and speeding up

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a

b and c are correct

b

a and b are correct

c

d only correct

d

b and d are correct

answer is A.

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Detailed Solution

The force exerted by the lift will be more than weight of the man if the acceleration of the man is in upward direction.

In the cases of going up and speeding up and going down and slowing down the acceleration is upwards.

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