Question

If the velocity of an object is doubled , it's kinetic energy is ?

A. Doubled

B.decreased

C. Quadrupled

D. Unaffected

Answer 1

Ek = 1/2 × m × v² ;
Ek...kinetic energy
m...mass
v...velocity

If we double the velocity,then Ek = 1/2 × m × (2×v)² = 1/2 × m × 4×v² = 2×m×v²


`(2*m*v ^(2) )/( (1)/(2)*m*v^2 ) = 4` so the correct answer is C