12.The force exerted by the floor of an elevator on the foot of the person standing there is more than the weight of the person if the elevator is 1) going up and slowing down 2) going up and speeding up 3) going down and slowing down 4) going down and speeding up

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Q. The force exerted by a person on the floor of an elevator 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

The force exerted by the floor of an elevator on the foot of a person is _______ the weight of the person if the elevator is going up and speeding up.

Q. The force exerted by the floor of an elevator on the foot of a person standing there is more than the weight of a person if the elevator is
A. going with increasing speed
B going down with decreasing speed

A is true B is false
A is false B is true
A andB are true
A and B are false

Q. A person of weight 60 kg wants to loose 5 kg by going up and down 10m high stairs. Assume he burns twice as much fat while going up than going down. If 1 kg of fat is burnt on expending 7000 kcal. How many times must he go up and down to reduce his 7 kg weight? (Take

g = 10 {m s}^{- 2})

Q. A person of mass

60 k g

wants to lose

5 k g

by going up and down a

10 m

high stairs. Assume he burns twice as much fat while going up than coming down. If

1 k g

of fat is burnt on expending

7000

kilo calories, how many times must he go up and down to reduce his weight by

5 k g

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