Physics-Work,Power,Energy

Question

Determine the work done by gravity on a 50kg bowling ball if the ball..

a)falls straight down 8m off the left edge of the ramp

b)Rolls 16m down the ramp

c) Rolls 10m up the ramp

d)Rolls 6m across level ground

Answer 1

a) mgh = 50*9.81*8= 3924 J

b) same as a

c) same as a if end of ramp is 8 meters lower

d) same as -a if end of ramp is 8 meters lower

e) zero