Civil Engineering - Applied Mechanics - Discussion


Pick up the correct statement from the following :

[A]. If two equal and perfectly elastic smooth spheres impinge directly, they interchange their velocities.
[B]. If a sphere impinges directly on an equal sphere which is at rest, then a fraction (1 - e2) the original kinetic energy is lost by the impact.
[C]. If a smooth sphere impinges on another sphere, which is at rest, the latter will move along the line of centres.
[D]. If two equal spheres which are perfectly elastic impinge at right angles, their direction after impact will still be at right angles.
[E]. All the above.

Answer: Option E


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