(a) Joule
Reason — The S.I. unit of work is joule. 1 joule of work is said to be done when a force of 1 newton displaces a body through a distance of 1 metre in its own direction.
(a) Joule
Reason — The S.I. unit of work is joule. 1 joule of work is said to be done when a force of 1 newton displaces a body through a distance of 1 metre in its own direction.
(a) Calculate the change in the gravitational potential energy of the skier between A and B. (b) If 75% of the energy in part (a) becomes the kinetic energy at B, calculate the speed at which the skier arrives at B.(Take g = 10 ms-2).