Question

Find the change in momentum of a body when its kinetic energy becomes 4 times the original value

Answer 1

let p = momentum and ke= kinetic energy
$p = \sqrt{2 \times ke \times m}$
i.e. p is directly proportional to
$\sqrt{ke}$
so new p = (4)^(1/2) = root 4 =2
so momentum increases 2 times