Question

A human cannonball act uses springy bungee cords instead of gunpowder to launch a person through a long cylindrical tube into the air. If a cannon is capable of launching a 55 kg test dummy 11 m into the air when launched straight up, how much energy is stored in the bungee cords? *

A. 539J
B. 605 J
C. 2965J
D. 5929 J

Answer 1

Answer:

Energy stored, E = 5929 J

Explanation:

Given that,

The mass of a test dummy, m = 55 kg

It is launched 11 m into the air.

We need to find the energy stored in the bungee cords. It can be calculated as follows :

$E=mgh\\\\E=55\times 9.8\times 11\\\\E=5929\ J$

So, 5929 J of energy is stored in the bungee cords.