A325 n box moves with a constant velocity of 3.75 m/s when pushed with a force of 425 n exerted at a 35.2 angle below the horizontal. what is the coefficient of kinetic friction between the box and the floor?

0.6

Explanation:

If we draw a free body diagram of the box we will have the following:

Net force in the x-axis:

(1)

Net force in the y-axis:

(2)

Where:

is the normal force

is the weight of the box

is the force exerted on the box

is the angle below the horizontal

is the friction force, being the coefficient of kinetic friction

Isolating from (1):

(3)

Substituting (3) in (2):

(4)

Finding :

(5)

(6)

Finally:

(5)

d. platinum would have the greatest temperature increase because it has the lowest specific heat.