A trolleybus weighing 15 tons starts to move with an acceleration of 1.4 m / s2.

A trolleybus weighing 15 tons starts to move with an acceleration of 1.4 m / s2. What kinetic energy will the trolleybus acquire on the first 10 meters of its journey?

To determine the value of the kinetic energy acquired by the considered trolleybus at the beginning of the journey, we apply the formula: Ek = m * V ^ 2/2 = m * (2a * S) / 2 = m * a * S.

The values of the variables: m is the mass of the considered trolleybus (m = 15 t = 15 * 10 ^ 3 kg); a – trolleybus acceleration during acceleration (a = 1.4 m / s2); S – initial path (S = 10 m).

Calculation: Ek = m * a * S = 15 * 10 ^ 3 * 1.4 * 10 = 210 * 10 ^ 3 J = 210 kJ.

Answer: On the first 10 m of the journey, the trolleybus under consideration will acquire a kinetic energy of 210 kJ.