2. A smooth surface is inclined at 20° to the horizontal. A body of mass 20 kg lies on the surface and is pulled at a un
Posted: Wed May 25, 2022 6:24 am
2. A smooth surface is inclined at 20° to the horizontal. A body of mass 20 kg lies on the surface and is pulled at a uniform speed a distance of 10 m up a line of greatest slope. Find the work done against gravity.