Magnitude of normal force from ceiling to man

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SUMMARY

The discussion centers on calculating the magnitude of the normal force exerted by the ceiling on a strongman standing on a scale. Given the strongman's mass of 93 kg and the scale reading of 1062 N, the normal force can be determined by analyzing the forces acting on the strongman. The gravitational force acting on him is calculated as N = m x g, where g is 9.81 m/s², resulting in a weight of 912 N. However, the total normal force from the ceiling must also account for the additional force exerted by the strongman pushing against it.

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Homework Statement


tall strongman of mass m = 93 kg stands upon a scale while at the same time pushing on the ceiling in a small room.If the scale reads 1062 N (about 239 lb), what is the magnitude of the normal force that the ceiling exerts on the strongman?



Homework Equations



N=m x g

The Attempt at a Solution



N= 93kg x 9.81= 912 N
 
Physics news on Phys.org
N = mg is not correct. Try drawing a good free-body diagram for the man. You'll need to consider how many forces act on the man and what direction they point.
 

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