Solution. Posted on Friday, May 15, 2015.
The formula of the kinetic energy is Ek = 0.5*m*v^2 , where m – a mass of the object (bicycle) and v – the velocity (speed) of the object.
Let’s compare between the initial kinetic energy and the final kinetic energy
The initial kinetic energy – Eki = 0.5*m*v^2
The final kinetic energy – Ekf = 0.5*(1/2*m)*(2*v)^2 = 2 * 0.5*m*v^2
Hence, we could see that the kinetic energy doubles. Ekf = 2*Eki or Ekf = 200 J.