KE = EPE
1/2 m v^2 = 1/2 kx^2 so
k =mv^2/x^2
Offhand I don't know how to find the time. The force is constantly changing so eq of motion and impulse momentum are out. Unless throw in some calculus.
you strike a huge spring at a speed of 30m/s while strapped in a steel cage. When you hit the spring with combined mass of 320kg it is compressed 9.0m. A) What is the spring constant of the spring? B) How long are you in contact with the spring before it bounces off in the opposite direction?
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