Question

When a massive body collides against a light body at rest ___________

(a) The light body starts moving

(b) The light body rebounds

(c) The velocity of the bodies get exchanged

(d) The massive body comes to rest

The question was posed to me during a job interview.

My enquiry is from Work and Energy topic in chapter Nature of Physical World of Engineering Physics I

Answer 1

The correct choice is (a) The light body starts moving

To explain I would say: When a massive body collides against a light body at rest, the velocity of the massive body remains almost unchanged while the light body starts moving with a velocity wise the velocity of the massive body.