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Physics
Physics
Problem
Which of the following expressions gives the kinetic energy
K
K
K
of an object of mass
m
m
m
moving with speed
v
v
v
? a)
K
=
m
v
2
K = m v^2
K
=
m
v
2
b)
K
=
m
g
h
K = m g h
K
=
m
g
h
c)
K
=
1
2
m
v
2
K = \tfrac12 m v^2
K
=
2
1
m
v
2
d)
K
=
1
2
m
v
2
+
m
g
h
K = \tfrac12 m v^2 + m g h
K
=
2
1
m
v
2
+
m
g
h
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