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3. An 8 kg stone rests on a vertical spring of force constant 785 N /...

3. An 8 kg stone rests on a vertical spring of force constant 785 N / m. The stone is pushed down about 30 cm and released. (a) Obtain the elastic potential energy of the compressed spring just before releasing it (b) Obtain the maximum height reached by the stone (c) Obtain the velocity just after it leaves the spring.

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Answer #1

m = 8 kg

k = 785 N / m

x = 30 cm

x = 0.3 m

(a) the elastic potential energy of the compressed spring just before releasing it is

(b) the maximum height reached by the stone is

h = 2x

h = 2*0.3 m

h = 0.6 m

h = 60 cm

(c) the velocity just after it leaves the spring is

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