jaidencoolman2510
20.05.2021 •
Physics
A person rides in an elevator. What is the equal and opposite force for the force of the elevator floor pushing up on the person as described by Newton's third law? Choose 1 Choose 1 (Choice A) A Person’s force of gravity pulls up on the elevator (Choice B) B Person’s force of gravity pulls up on the Earth (Choice C) C Person pushes down on the floor (Choice D) D Earth’s force of gravity pulls down on the person
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Ответ:
40 J
Explanation:
Work = change in energy
W = 1/2 k (Δx)²
First we need to find the value of k.
F = kΔx
10 N = k (0.04 m)
k = 250 N/m
Solving for work
W = (250 N/m) (0.40 m)²
W = 40 J