Question

the speed of a car increases 4 times what is the increase in its kinetic energy​

Answer 1

let initial speed = v

let final speed (V) = 4v

initial K.E. = 0.5 mv²

final K.E. = 0.5 mV²

and we know that V = 4v

so final K.E. = 0.5m(4)²v²

final K.E.= 16* 0.5 mv²

so, Final K.E. = 16 Initial K.E.

Answer 2

Answer:

Kinetic energy of a moving body is given by, K.E. ∝ v2.So, when the speed of car increases 4 times, kinetic energy becomes 16 times of it s ..