A boy who is riding his bicycle, moves with an initial velocity of 5 m/s. ten second later, he is moving at 15 m/s. what is his acceleration

A boy who is riding his bicycle, moves with an initial velocity of 5 m/s. Ten second later, he is moving at 15 m/s. What is his acceleration?

Initial Velocity (u) - 5 m/sFinal Velocity (v) - 15 m/sTime (t) - 10 sec

If the velocity of an object changes from an initial value u to the final value v in time t, the acceleration a is,

His acceleration is

The correct answer is  "c".  it is "c" because melting is an endothermic change, and endothermic get's energy from surroundings.