Physics Homework Question?

Question

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?

Answer 1

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: .

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

Loss of energy due to friction : .

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

Thermal energy due is friction is 408.55 J.