Q

When an object of mass m is moving with a velocity v, its kinetic energy is K, what will be its kinetic energy if its velocity is doubled?

RRB Group D 19 Aug, 2026 (4:30 PM - 6:00 PM) 2026
✓ Answer: A 4K
The correct choice is 4K. It follows from the relevant Newtonian mechanics, motion, work, energy, power or simple-machine relationship.
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