Physics, asked by shirishsaklecha4197, 10 months ago

kinetic energy of moving car if velocity is reduced to 1\3 rd of the initial velocity

Answers

Answered by msn9258
0

Answer:

Given: Initial velocity =v; Final velocity =

3

v

Initial kinetic energy k

1

=

2

1

×m×v

2

Final kinetic energy k

2

=

2

1

×m×(

3

v

)

2

=

9

1

×

2

1

mv

2

Change in kinetic energy =

2

1

mv

2

9

1

×

2

1

mv

2

=

2

1

mv

2

(1−

9

1

)

=

9

8

×

2

1

×mv

2

=

9

8

× Initial kinetic energy.

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