At the lowest point in the jump when the student is stationary, the extension of the bungee cord is 35 metres.
The bungee cord behaves like a spring with a spring constant of 40 N / m.
Calculate the energy stored in the stretched bungee cord.
Use the correct equation from the Physics Equations Sheet.
when it is released,let say elongation at mean point is x. So at maximum elongation it'll become 2x. So 2x=35. x= 17.5m. Now energy stored in the stretched bungee cord is E= 1/2 kx^2.( k= 40N/m ). E= 1/2 x 40 x (17.5)^2 = 6125J. Hope it helps.
