A moving car has kinetic energy. If it speeds up until it is going four times faster than before, how much kinetic energy does i

Question

3 years ago

13

t have in comparison?

1 answer:

Eva8 [605] · Answer 1 · 2022-03-08T21:14:38+03:00

<h2>Ratio of final kinetic energy to initial kinetic energy is 16.</h2>

Explanation:

Kinetic energy , KE = 0.5mv²

Here car speeds up to four times the initial speed, we need to find ratio of final kinetic energy to initial kinetic energy.

Final speed = 4 x Initial speed = 4v

Initial KE = 0.5mv²

Final KE = 0.5 x m x (4v)²

Final KE = 16 x 0.5 x m x v²

Final KE = 16 x Initial KE

Ratio of final kinetic energy to initial kinetic energy is 16.