Numerical Problem No. 3.3 (Dynamics) Physics SSC - I (Class 9)

How much force is needed to prevent a body of mass 10kg from falling? Ans. (100 N)

Given:  

Mass of the body = m = 20 kg

Gravitational Acceleration = g = 10 m s⁻²

To Find:

Normal Reaction ( R )= Weight of the body ( W )=   ? 

Solution:  

the formula for weight is 

W = mg

or

R = mg

by putting values

R = 10 kg ｘ  10 m s⁻²

R = 100 N

So, the Force needed to hold a body from falling is the weight of  the body is 100 N

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