Grade 12 University physics
posted by Alex .
A 1.2kg block is dropped from 48cm above a spring in equilibrium. The force constant for the spring is 124N/m. Calculate the maximum compression in the spring.

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Sra 
If X is maximum spring compression, and H is the height from which the block falls (0.48 m), conservation of energy tell you that
M g (H + X) = (1/2) k X^2
where k is the spring's force constant.
Solve for X
Take the positive root of the resulting quadratic equation.