a horse pull a barge with a force at an angle of 30¡ã to the horizontal for a distance of 20km . find the work done.

1 answer

You need to know the magnitude of the pulling force. If mass and coef of friction are given and the velocity is constant then it is
horizontal force = F cos 30 = m g (mu-sin 30)

W = F cos 30 * 20*10^3 J