Question

speed of a car becomes 2 times, its kinetic energy becomes

(a) 4 times
(b) 8 times
(c) 16 times
(d) 12 times
plz tell correct ans
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Answer 1

Answer:

4 times

Explanation:

Kinetic energy increases with the square of the speed. Neglecting friction, an engine does four times as much work to make a car reach a speed of 60 miles/h as to make it reach a speed of 30 miles/h. When the speed of a car is doubled, its kinetic energy increases by a factor of four.