Question

9. a man riding in an elevator experiences a normal force greater than his actual weight. which one of the following statements could be true? a) the elevator moves upward with constant speed. b) the elevator moves downward with constant speed. c) the elevator moves upward with decreasing speed. d) the elevator moves downward with decreasing speed. e) the elevator moves downward with increasing speed.

Answer 1

A man riding in an elevator experiences a normal force greater than his actual weight when the elevator moves downward with decreasing acceleration.

If the elevator is moving at a constant velocity, the weighing machine would measure the same weight of the man as it would at rest.

If elevator is accelerating upward we feel heavier, and if elevator is accelerating downward we feel lighter.

N = m(g+a) if the elevator has a net upward acceleration.

N = m(g-a) if the elevator has a net downward acceleration.

Man will feel his weight less the actual weight when the elevator goes down with some acceleration.

Because N=m(g−a) where a=downward acceleration.

The weighing machine will read the weight as m(g−a).

But when the elevator moves downward with decreasing acceleration, means net acceleration will be upward. Hence, A man riding in an elevator experiences a normal force greater than his actual weight when the elevator moves downward with decreasing acceleration.

To learn more about lift problem visit the link- https://brainly.com/question/22048837

#SPJ4