Lesson 6 energy transfers : bungee jumpers

Question 1

In a bungee jump why will the jumper never return back to its original position

Answer 1

because energy is dissipated as thermal energy

Question 2

why is energy dissipated as thermal energy

Answer 2

this is due to:

friction with air particles

stretching effects in the bungee rope which is not fully elastic

Question 3

at the start of a bungee jump all of the energy in the system is a store of what

Answer 3

gpe

Question 4

as the jumper falls from, energy is transferred from the gpe to store to the

Answer 4

ke store

Question 5

when the bungee rope just starts to tighten which type of energy store is at its maximum

Answer 5

ke

Question 6

when the rope is fully extended, how much ke does it have

Answer 6

zero as the jumper is not moving

Question 7

as the rope is fully extended and the jumper is not moving what has all the energy been transferred to

Answer 7

epe store

Question 8

after the bungee rope is extended, then what occurs

Answer 8

it recoils

Question 9

once the bungee rope recoils, what occurs

Answer 9

energy is transferred to the epe store back to the ke store

Question 10

during the ascent of the bungee rope what occurs

Answer 10

energy transfers of the ke store is transferred back to the gpe store

Question 11

at the top of the ascent all of the energy is back now into

Answer 11

gpe store