MereTeacher

JEE • NEET • FOUNDATION

JEE · NEET Previous Year Question

$When two bodies collide elastically, then$

Topic: JEE PYQ

Answer: C. Full step-by-step solution below.

A $kinetic energy of the system along is conserved$
B $only momentum is conserved$
C $both kinetic energy and momentum is conserved$
D $Neither kinetic energy nor momentum is conserved$

Correct answer: C

Solution

(c) In elastic collision, both kinetic energy and momentum are conserved. Total energy is also conserved.

More Collision & Variable Mass PYQs

$A ball is thrown vertically downwards from a height of 20 m with an initial velocity v_{0} . It collides with the ground, lose\dots$
$A machine gun of mass 10 kg fires 20 g bullets at the rate of 180 bullets per minute with a speed of 100 m s^{- 1} each. The reco\dots$
$A moving particle collides with a stationary particle of mass times the mass of moving particle, the fraction of it…$
$Two particles A and B, move with constant velocities v_{1} and v_{2} . At the initial moment their position vectors\dots$
$Two bodies of mass 1 kg and 3 kg have position vectors i + 2 j + k and - 3 i - 2 j + k, respectively. The centre of ma\dots$