The sled, which rolled down the mountain, drove on a horizontal surface of 25 m, slowing down under the action

The sled, which rolled down the mountain, drove on a horizontal surface of 25 m, slowing down under the action of a friction force of 30H. Determine the work of the friction force on the horizontal section of the trajectory of the sled

To calculate the required work of the friction force, we apply the formula (we take into account that the vectors of displacement of the sled and the friction force are oppositely directed): A = -F * S.

Values of variables: F – friction force (F = 30 N); S – sled movement (S = 25 m).

Let’s calculate: A = -F * S = -30 * 25 = -750 J.

Answer: The frictional force did the work at -750 J.