A65 n boy sits on a sled weighing 52 n on a horizontal surface. the coefficient of friction between the sled and the snow is 0.012. what is the magnitude of the frictional force?

1.40 N

Explanation:

The magnitude of the frictional force is given by:

where

is the coefficient of friction

N is the magnitude of the normal reaction

The coefficient of friction for this problem is . The magnitude of the normal reaction is equal to the combined weight of the boy and the sled, because the surface is horizontal, so

Therefore, the frictional force is

positive reinforcement? ?

the area between the graph and the t axis