An Automobile traveling at 25 km/hour has a kinetic energy equal to 1x 10^4 J. a: what is the mass of the car? b. If the velocity of the car is
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# An Automobile traveling at 25 km/hour has a kinetic energy equal to 1x 10^4 J.a: what is the mass of the

car?

b. If the velocity of the car is increased to 45 kn/hr, what is the kinetic energy?

c. If the velocity is increased to 80 km/hr, what is it's kinetic energy?

80 / m
a )
kinetic energy = + my?
2
so , we have velocity- a5x long
3650-
= 6.9 4-ra
R. E = 1X 10* J = _ mx ( 6.94 ) 2
m
=
2 x 104
( 6 . 9 4)
4 15. 25 kq
b ) when velocity = 45 kim/ , = 45 x 1000
K...

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