Here
radius , r = 1.82 m
u = 0.12
W = 65 N
work done by friction = distance * force
work done by friction = 65 * 0.12 * 2pi * 1.82
work done by friction = 89.2 J
-------------------------
W = 10 N
h = 5 m
as the total mechanical energy is conserved
after falling 1 m
total mechanical energy = W * h
total mechanical energy = 10 * 5
total mechanical energy = 50 J
Could I get help with two questions surrounding joules? A battery-powered train travels in a complete...