Question

the velocity of a car increases from 54kmper hour to 72km per hoir how much os the work done if the mass of the car is 1500kg​

Answer 1

Answer:

the answer is w=131250J

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Answer 2

= 54km/h

= 54*5/18

=15 m /s

= 72km /h

=72*5/18

= 20 m/s

= 1500 kg

=1/2 mv ²

= 1/2 *1500 *15(2)

= 168750J

=1/2 mv ²

=1/2 *1500 *20(2)

= 300000J

=

= 300000- 168750

= 131250