A bungee jumper hangs from a bungee cord with zero velocity. If the bungee cord has a spring constant of 18 N/m and the jumper has a mass of 113 kg, how stretched is the bungee cord past its natural length?

A. 6.27 m
B. 1.56 m
C. 18.2 m
D. 61.5 m

Question

A bungee jumper hangs from a bungee cord with zero velocity. If the bungee cord has a spring constant of 18 N/m and the jumper has a mass of 113 kg, how stretched is the bungee cord past its natural length?

 		A.	6.27 m
 		B.	1.56 m
 		C.	18.2 m
 		D.	61.5 m

anonymous · Answer

Do you know what to do on this one? @roadjester

roadjester · Answer

is the answer D?

anonymous · Answer

Tanks @roadjester

roadjester · Answer

$$\large F=ma$$
$$\large F=-kx$$
$$\large -kx=ma$$
since -k is a restoration factor, the negative sign does not mean it is in fact negative, it just means that the x is being stretched by that much

do you know how I got my answer from there?