Question

what do you mean by work give an example of negative work done what is the work to be done to increase the velocity from 18 km per hour to 19 km per hour if the mass of the case 2000 kg​

Answer 1

work is done when a force acting on a body produces displacement in it . example of negative work : If a ball is thrown in upward direction its displacement would be in upward direction but the force due to Earth gravity is in the down direction.