A 10kg object is dropped from rest from the top of a 100m cliff. Exactly one second later, an 8g bullet is fired upward from the ground with a muzzle velocity of 300(m)/(s). Assume an inelastic collision occurs between the two objects. How long after the 10kg object is dropped will the combined object hit the ground? Compare that time to the time for the 10kg object to hit the ground without 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.