Answer:
energy would become four times
Explanation:
Kinetic energy K= 0.5mv^2
⇒[tex]v=\sqrt{\frac{2m}{K} }[/tex]
now, v'= 2v
[tex]2v=v'=2\sqrt{\frac{2m}{K} }[/tex]
v'=[tex]\sqrt{\frac{2\times4E}{m} }[/tex]
hence, speed can be doubled by four folding the energy or by decreasing mass to one fourth.
