A body of mass 10 kg is moving with a velocity of 5 m/s. What is its kinetic energy?
Correct: B
Kinetic energy (K) is given by K = 1/2 mv^2, where m is the mass and v is the velocity. Given, m = 10 kg, v = 5 m/s. Substituting these values gives K = 1/2 × 10 × (5)^2 = 125 J.