A gardener pulls a lawn roller on a horizontal path by applying a force of through a…
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A gardener pulls a lawn roller on a horizontal path by applying a force of 50N through a handle that makes an angle of 30∘ above the horizontal. At a certain instant, the roller is moving straight ahead with a speed of 0.80ms−1.
(i) Write the general expression for the instantaneous power delivered by a force acting on a moving body.
(ii) Using the data given, calculate the instantaneous power supplied by the gardener to the roller.