Final answer:
A Newton's Cradle is a device used to demonstrate the laws of conservation of momentum and energy, consisting of a series of equally spaced, identical steel balls suspended from a frame.
Step-by-step explanation:
The device that demonstrates the conservation of momentum and energy using a series of swinging spheres is known as a Newton's Cradle. Newton's Cradle is a device that demonstrates the laws of physics including conservation of momentum and energy.
It consists of a series of equally spaced, identical steel balls suspended from a frame. When one of the end spheres is lifted and then let go, it swings back and strikes the stationary spheres, transferring momentum through the series of spheres.
The last sphere on the opposite end then swings out and back, demonstrating how energy and momentum are conserved in a closed system.
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