Answer
9 m
Explanation
The energy stored in a spring is given by:
Energy = 1/2 k²e
Where e is the compression and k is the spring constant.
Energy = 1/2 × 176,400 × 0.2²
= 3,528 N
The same energy will then be converted to potential energy given by:
Energy = mgh
Where m is the mass, g is the gravity and h is the height above the ground.
Energy = mgh
3,528 = 40 × 9.8 × h
3,528 = 392h
h = 9 m
