State the law of conservation for mechanical energy A child of mass m is release

Question

State the law of conservation for mechanical energy A child of mass m is released from rest at the top of a waterslide, at a height 10 m above the bottom of the slide. Assumingthat the slide is frictionless because of the water on it, find thechild’s speed at the bottom of the slide. A child of mass m is released from rest at the top of a waterslide, at a height 10 m above the bottom of the slide. Assumingthat the slide is frictionless because of the water on it, find thechild’s speed at the bottom of the slide. A child of mass m is released from rest at the top of a waterslide, at a height 10 m above the bottom of the slide. Assumingthat the slide is frictionless because of the water on it, find thechild’s speed at the bottom of the slide.

Explanation / Answer

According to conservation of energy we have            mgh = 0.5 mv2        ==> v = 2gh =2 * 9.8*10 = 14 m/s

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