A mass hangs vertically from a spring.
The mass is raised to a point P and is then released.
The mass oscillates repeatedly between point P and a lower point Q.
Which energies alternately increase and decrease throughout the oscillations?
gravitational potential energy, kinetic energy and elastic energy
2 )
gravitational potential energy and kinetic energy only
3 )
gravitational potential energy, kinetic energy and internal energy
4 )
internal energy and elastic energy
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