A 80-kg man jumps out a window into a fire net 10 m below. The net stretches 2.0 m before bringing him to rest and tossing him back into the air. What is the potential energy of the stretched net if nonconservative forces dissipate no energy?

Question

Arun · Answer

Dear student

Mass of man = 80 kg

Hence total weight. = m *g = 80 *9.8 = 784 N

The man's energy of falling is arrested when he has fallen 10 meters to the net plus another 2 meters of stretching the net. His weight is 784 N, so the total energy is:

784 N * (10 m + 2 m)
= 9408 N-m = 9408 J

If the net is fully elastic, the potential energy of the net is equal to the gravitational energy absorbed.

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A 80-kg man jumps out a window into a fire net 10 m below. The net stretches 2.0 m before bringing him to rest and tossing him back into the air. What is the potential energy of the stretched net if nonconservative forces dissipate no energy?

A 80-kg man jumps out a window into a fire net 10 m below. The net stretches 2.0 m before bringing him to rest and tossing him back into the air. What is the potential energy of the stretched net if nonconservative forces dissipate no energy?

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A 80-kg man jumps out a window into a fire net 10 m below. The net stretches 2.0 m before bringing him to rest and tossing him back into the air. What is the potential energy of the stretched net if nonconservative forces dissipate no energy?

A 80-kg man jumps out a window into a fire net 10 m below. The net stretches 2.0 m before bringing him to rest and tossing him back into the air. What is the potential energy of the stretched net if nonconservative forces dissipate no energy?

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