D1 PBL: Gravitational potential
A 1kg ball is at the bottom of the 10m deep, round hole shown in the image. The ball is pushed out of the hole at constant speed by exerting a force in the horizontal direction. Lines of equipotential are lines joining points where the ball would have equal potential energy. Potential is defined as the work done per unit mass taking a small test mass from infinity to the point in question. The diagram below shows the...