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Physics Homework Question?

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A 21.0-kg child descends a slide 2.10 m high and reaches the bottom with a speed of 1.50 m/s .

How much thermal energy due to friction was generated in this process?

asked Oct 2, 2015 in PHYSICS by anonymous

1 Answer

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Mass of the child is 21.0 kg.

Height from which the child decends is 2.10 m.

Speed of the child is 1.50 m/sec.

Potential energy exerted by child at the top of the child: image.

image

Kinectic energy exerted by the child at the bottom of the child: image.

image

Loss of energy due to friction : image.

image

Energy generated due to the force of friction is the thermal energy.

Thermal energy due is friction is 408.55 J.

answered Oct 2, 2015 by Lucy Mentor
edited Oct 2, 2015 by Lucy

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