Question

At the start of the experiment, the spring device is compressed to setting number 1 and
released to propel the trolley P forward. When trolley P collides with trolley Q. both trolley
move together for certain distance. Identify the physical quantities that vary for both trolleys
before and after the collision.
(1) Mass, velocity
(2) Mass, momentum
(3) Mass, kinetic energy
(4) Velocity, momentum​

Answer 1

Answer:

the correct answer is :-

MASS,VELOCITY

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Explanation:

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