Question

A lift is going up with an acceleration 2g a man is inside the lift and his mass is m what will be the reaction of the floor of the man

Answer 1

Hii dear,

Given -

mass=m

a = 2g

N = ?

Solution -

For these type of questions you must draw a free body diagram

(I've attached the diagram as image)

Force exerted on the floor by the man is called normal force (N).

According to Newtons 2nd law of motion,

ΣF = ma

N - mg = 2mg

N = 3mg

N = 3 × 9.8 × m

N = 29.4m N

Force exerted on the floor by the man is 3mg and vertically upward in direction.

Best luck...

Answer 2

Answer:

3 mg

Explanation:

ACCORDING TO FORMULA

F= N -mg ,according to 2nd law of motion F= ma equation may be written as

ma = N- mg , N = ma + mg

Substituting a = 2g then we get , N = 3mg