Question

A child of mass 25 kg sits on a chair. What is the normal force acting on the child.

A 79.2N
B 133N
C 25.0 N
D 245N

Answer 1

The answer you are looking for is D. 245N.
Work shown: -mg= -25*9.8=245 N
So, gravity is pulling down the chair, the chair is exerting a normal force upward in response.

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