The stunt person has a mass of 85kg. the speed of the person when reaching the ground is 20ms-1. The height of his starting position is 30m and the length of the cable he goes down is 50m.
Calculate:
A) the change in gravitational potential energy of the person
B) the final kinetic energy of the person
C) the work done against friction
D) the average friction acting on the person
any help on any of these questions would be much appreciated
thanks
Calculate:
A) the change in gravitational potential energy of the person
B) the final kinetic energy of the person
C) the work done against friction
D) the average friction acting on the person
any help on any of these questions would be much appreciated
thanks