Find the work done by the 80.4 N force. The acceleration of gravity is 9.8 m/s 2 . Answer in units of J.

Question

A 19.4 kg block is dragged over a rough, horizontal surface by a constant force of 80.4 N acting at an angle of 28.7 ◦ above the horizontal. The block is displaced 61.8 m, and the coefficient of kinetic friction is 0.113 .find the work done by the 80.4 N force. The acceleration of gravity is 9.8 m/s 2 . Answer in units of J.

Answer 1

W=F.d=FdCos(θ)=80.4×61.8×Cos(28.7)=4358.3 J