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A bungee jumper of mass 160kg falls from a cliff. The bungee cord has a natural length of 5.0m and a stiffness constant of 3.0N/m. The air resistance is a constant force of 4.0N, what's the speed of the jumper when the total length of cord is 5.9m?

This is an example of an energy consideration problem involving work done in the context of a Hooke's law situation. Firstly draw a diagram to show what's going on. Then recall that the work done by the air ...
CP
Answered by Caspar P. • Physics tutor
2015 Views

How does a vacuum flask keep a beverage warm for long periods? (6 Marks)

Heat is lost in the fluid through Conduction convection radiation and evaporation. The silvered surfaces reflect infrared rays back into the liquid keeping heat in the fluid reducing heat lost by radiation. ...
LL
Answered by Lewis L. • Physics tutor
16289 Views

What is the difference between a transverse and longitudinal wave?

A transverse wave is a wave where the direction of vibration is perpendicular (90 degrees) to the direction of travel (an example would be a wave in the sea), and a longitudinal wave is a wave where the vibr...
JC
Answered by Jared C. • Physics tutor
3905 Views

How does the resistance of a filament lamp change as the voltage increase?

The resistance of a filament lamp increases as the potential difference increases because the filament becomes hot. The movement of electrons (which is what causes the current) makes the atoms inside the fil...
JC
Answered by Jared C. • Physics tutor
59542 Views

Name two properties that both microwave and infrared has.

They travel at the same speed (speed of light) in vacuum, and they can both be polarised.
BK
Answered by Bettiina K. • Physics tutor
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