Answer :

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.

**Hope this helps you! If you have any further questions then message me. Have a nice day! :)**

P.S. Can you give me brainliest?

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Rewritten by : Barada