If the speed of a body is doubled, its kinetic energy becomes:

Explanation

If the speed of a body is doubled, its kinetic energy becomes four times its original value. The kinetic energy (KE) of an object is given by the equation: KE = (1/2) * m * v^2 Where m is the mass of the object and v is its velocity (speed). When the speed of the body is doubled, we can express the new speed as 2v (twice the original velocity). Substituting the new speed into the equation for kinetic energy, we have: KE_new = (1/2) * m * (2v)^2 = (1/2) * m * 4v^2 = 4 * (1/2) * m * v^2 = 4 *KE-original Therefore, when the speed of a body is doubled, its kinetic energy becomes four times its original value { 4 x (1/2) mv2 = 2 mv2 }.