Inertia 2
Inertia is an object’s resistance to changes in motion unless acted upon by a force. Initially, the car is at rest on top of the dynamics cart and block. The second dynamics cart collides with the first, exerting a force that accelerates the first dynamics cart to the left. The friction between the dynamics cart and the block accelerates the block to the left as well. The near-frictionless axles on the car reduce the force of friction to a negligible amount, thus gravity is the only force acting on the car.