Question
A tractor of mass 5*10^3kg is used to tow a car of mass 2.5*10^3kg.the tractor moves with a speed of 3.0m/s just before the towing rope become taut
Calculate loss in kinetic energy of the system just after the car has started moving
Calculate loss in kinetic energy of the system just after the car has started moving
Answers
oobleck
conserve momentum:
5*10^3 * 3 = (5*10^3 + 2.5*10^3)v
Having v, you can now see that
KE before: 1/2 (5*10^3)*3^2
KE after: 1/2 (5*10^3 + 2.5*10^3)v^2
the difference is KE lost
5*10^3 * 3 = (5*10^3 + 2.5*10^3)v
Having v, you can now see that
KE before: 1/2 (5*10^3)*3^2
KE after: 1/2 (5*10^3 + 2.5*10^3)v^2
the difference is KE lost