Based on the compression of the spring and the speed, the following are true:
Potential energy is found as:
= 0.5k x (2 x compression²)
= 4 x 1/2kx²
The 4 shows that the potential energy increases by 4 times.
Initial speed is:
= x × √(k/m)
New speed will be:
= Compression factor x speed
= 2x × √(k/m)
The speed will therefore be increased by a factor of 2.
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