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rosijanka [135]
2 years ago
10

A compressed spring stores 720 J of energy. A 1 kg block rests on the end of the spring. The spring is released and comes back t

o its uncompressed length pushing the block away. What is kinetic energy of the block as it leaves the spring? What is the speed of the block at this instant?
Physics
1 answer:
iogann1982 [59]2 years ago
4 0

Answer:

the kinetic energy of block will be equal to energy stored in spring ie 720 J

the speed of block will be 37.9 m/s

Explanation:

E = m v^2 / 2

v = sqrt (2 * E / m)

v = sqrt (2 * 720 J / 1 kg) = 37.9 m/s

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