Car B is initially stationary and is struck by car A moving with initial speed ?1 = 20 mi/hr. The cars become entangled and move together with speed ?′ after the collision. If the time duration of the collision is 0.1 sec, determine (a) the common final speed ?′, (b) the average acceleration of each car during the collision, and (c) the magnitude R of the average force exerted by each car on the other car during the impact. All brakes are released during the collision.

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.