jonahfetter jonahfetter

13-08-2020
Physics

contestada

A waiter is carrying a tray above his head and walking at a constant velocity. If he applies a force of 5.0 newtons on the tray and covers a distance of 10.0 meters, how much work is being done?

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MathPhys MathPhys

13-08-2020

Answer:

0 J

Explanation:

Work is the dot product of force and displacement. In other words, it is the force times the distance traveled in the direction of the force.

W = Fd cos θ

In this case, the force is vertical and the displacement is horizontal. So the angle between them is θ = 90°. The work done is:

W = (5.0 N) (10.0 m) cos(90°)

W = 0 J

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