A man with a mass of 81 kg lies on the floor. What is the normal force on the man?

A. 855 N
B. 794 N
C. 713 N
D. 820 N

F = m ⋅ g ∧ g ≈ 9.8 m / s 2 F ≈ 81 k g ⋅ 9.8 m / s 2 = 793.8 s 2 k g ⋅ m ​ ≈ 794 N ⇒ A n s . B

Answered by kate200468 | 2024-06-10

Forces come in pairs, so the force of gravity (9.8 N) with the mans weight (794N) on the earth is counteracted with the normal force ( the force of the earth back on the man) which is the same

Answered by Lexmcg | 2024-06-10

The normal force acting on the man with a mass of 81 kg lying on the floor is equal to his weight, which is approximately 794 N. Therefore, the correct answer is option B. This balance of forces ensures the man remains at rest without accelerating towards the ground.
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Answered by kate200468 | 2024-10-29