Question

A skier of mass 10 kg walks from the bottom of a ski slope to the top and gains 10 000 J of gravitational potential energy. She skis down the slope and at the bottom of the slope her kinetic energy is 2000 J. What is her speed at the bottom of the slope?

Answer 1

Answer:

v = 20 m/s

Explanation:

KE = 1/2 m v^2

1

2000 = ------ × 10 v^2

2

2000 = 5 × v^2

v^2 = 2000 /5

= 400

v = Sqareroot 400

= 20 m/s