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Person X pushes twice as hard against a stationary brick wall as person Y. Which one of the following statements is correct?
A) Both do positive work, but person X does four times the work of person Y.
B) Both do positive work, but person X does twice the work of person Y.
C) Both do the same amount of positive work.
D) Both do zero work.
E) Both do positive work, but person X does one-half the work of person Y.

Respuesta :

skyluke89

Answer:

D) Both do zero work

Explanation:

The work done by a force is given by:

[tex]W=Fd cos \theta[/tex]

where

F is the force applied

d is the displacement

[tex]\theta[/tex] is the angle between the direction of the force and the displacement

From the formula, we notice that work is done online when the displacement is non-zero, so when the object is moving.

In this problem, the wall is stationary: this means that the displacement is zero, d = 0, so no work is done.

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