A person is pushing on a box,exerting a force of magnitude P,as shown in the figure.Earth exerts force W on the box.The push is directed at an angle θ below the horizontal,and the box remains at rest.The box rests on a horizontal floor that has some friction with the box.The friction force exerted by the floor on the box is equal to
A)P sin θ
B)P cos θ
C)0
D)P cos θ + W
E)P + W

Question

A person is pushing on a box,exerting a force of magnitude P,as shown in the figure.Earth exerts force W on the box.The push is directed at an angle θ below the horizontal,and the box remains at rest.The box rests on a horizontal floor that has some friction with the box.The friction force exerted by the floor on the box is equal to 
A)P sin θ 
B)P cos θ 
C)0 
D)P cos θ + W 
E)P + W

Quizplus · Accepted Answer

The Answer of A person is pushing on a box,exerting a force of magnitude P,as shown in the figure.Earth exerts force W on the box.The push is directed at an angle θ below the horizontal,and the box remains at rest.The box rests on a horizontal floor that has some friction with the box.The friction force exerted by the floor on the box is equal to 
A)P sin θ 
B)P cos θ 
C)0 
D)P cos θ + W 
E)P + W

A Person Is Pushing on a Box,exerting a Force of Magnitude