Question

A lift moves up and down with an acceleration of 2m/s^2.in each case, calculate the reaction of the floor on a man of mass 50kg standing in the lift

Answer 1

Answer:

The reaction is 100N

Explanation:

Given data,

Acceleration(a)=2m/so

Mass(m)=50kg

Force(F)=required

From,

Force (F)=mass(m)×acceleration(a)

F=50kg × 2m/so

F=100N

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Answer 2

Explanation:

I hope it helps.

Acceleration =2 m/s^2

Actual weight (w=MG) =50kg =500 N

Apparent weight(R) =?

Upward

F=R-mg

ma+mg=R

50*2 + 500=R

R=600N

Downward

Mg-R=F

Mg-ma=F

500-50*2=F

F=400N