Question

If the mass of a body is reduced to half and velocity is doubled, how does its KE change?

Answer 1

Answer:

let mass be m and final velocity be v

then, KE = 1/2 × mv^2

if mass is reduced to half then mass = 1/2 × m

if velocity is doubled then square of velocity = 4v^2

so, KE = 1/2 × 1/2 × m × 4 × v^2

that is, KE = mv^2

as mv^2 = 2 × 1/2 mv^2

we can say that if velocity is doubled and mass is reduced to half then KE is doubled

Answer 2

$\huge\mathfrak\red{Answer}$

New KE = 1/2. ... (2v)^2 = mv^2 = Double of Original KE KE will get doubled.

Hope it helps!

Mark me as Brainlist plz:)