Question

find the average power pavg created by the force f in terms of the average speed vavg of the sled.

A sled of mass  is being pulled horizontally by a constant upward force of magnitude  that makes an angle  with the direction of motion. The coefficient of kinetic friction is . The average velocity of the sled is .

Part D

Find the average power  created by force .

Express your answer in terms of , , and .

=

Let us now consider several questions that include numeric data.

A sled is being pulled along a horizontal surface by a horizontal force  of magnitude 600 N. Starting from rest, the sled speeds up with acceleration 0.08  for 1 minute.

Part E

Find the average power  created by force .

Express your answer in watts to three significant figures.

=

Part F

Find the instantaneous power  created by force  at .

Express your answer in watts to three significant figures.

=