Question

A lawn mower of mass = 9.3 kg starts at position x = 0 moving along positive x direction, with mechanical kinetic energy of 1.1 J. Calculate its initial velocity.

It accelerates due to the force of my hands of pushing at an angle of 15 deg wrt horizontal for 7.8 s and is then moving at 4.3 m/s. What is the force of my hands?

How much work is done by my hands? What is the power supplied by my hands to the mower?

Answer 1