A lawn roller is pushed across a lawn by a force of 103 N along the direction of the handle, which is 22.5° above the horizontal. If 63.0 W of power is developed for 90.0 s, what distance is the roller pushed?

Answer 1

P = 63.0 Watts = 63.0 J/s.

P = 103*cos22.5 * d/90 = 63 Watts/s
103*cos22.5 * d/90 = 63
103*cos22.5 * d = 63*90 = 5670
d = 5670/103*cos22.5 = 51 m.