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Physics
Physics
Problem
Which of the following expressions gives the speed
v
v
v
of a body of mass
m
m
m
when its kinetic energy is
K
K
K
? a)
v
=
K
m
v=\sqrt{\dfrac{K}{m}}
v
=
m
K
b)
v
=
2
K
m
v=2\sqrt{\dfrac{K}{m}}
v
=
2
m
K
c)
v
=
2
K
m
v=\sqrt{\dfrac{2K}{m}}
v
=
m
2
K
d)
v
=
K
2
m
v=\sqrt{\dfrac{K}{2m}}
v
=
2
m
K
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