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48.
What is the kinetic energy of a 1.50 x 10
3
kg Mustang with speed of 120. km/h ?
A.
2.50 x 10
5
J
C.
5.00 x 10
5
J
B.
8.32 x 10
5
J
D.
1.66 x 10
5
J
120 km 1 h 1000 m
------------ x ------------ x ------------- = 33.3 m/s
1 h 3600 s 1 km
KE = 1/2 mv
2
= 0.5 x 1.50 x 10
3
kg x (33.3 m s
-1
)
2
=
8.32 x 10
5
J
The Correct Answer is B.
