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Physics
Physics
Problem
A solid sphere of mass
M
M
M
and radius
R
R
R
starts from rest and rolls without slipping down a rough inclined plane of height
h
h
h
. What is the rotational kinetic energy of the sphere when it reaches the bottom? a)
1
2
M
g
h
\dfrac{1}{2} M g h
2
1
M
g
h
b)
2
5
M
g
h
\dfrac{2}{5} M g h
5
2
M
g
h
c)
2
7
M
g
h
\dfrac{2}{7} M g h
7
2
M
g
h
d)
5
7
M
g
h
\dfrac{5}{7} M g h
7
5
M
g
h
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