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Accelerate JEE 2020: Centre of Mass and Rigid Body Dynamics Class 6 (07.09.2019)

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Question 1

Two elastic bodies P and Q having equal masses are moving along the same line with velocities of 16 m/s and 10m/s respectively. Their velocities after the elastic collision will be in m/s -

Question 2

A monkey of mass 20 kg rides on a 40 kg trolley moving with constant speed of 8 m/s along a horizontal track. If the monkey jumps vertically to grab the overhanging branch of a tree, the speed (in m/s) of the trolley in the horizontal direction after the monkey has jumped off is -

Question 3

Two solid balls of rubber A and B whose masses are 200gm and 400gm respectively are moving in mutually opposite directions. If the velocity A is 0.3 m/s and both the balls come to rest after the collision, then the velocity of ball B is-

Question 4

An explosion took place in 10^-5 s which resulted in the formation of three equal pieces out of a stationary body of mass 6kg. Two of the pieces fly off at right angles to each other, one with velocity 4i m/s and other with velocity 6j m/s, average force on the third piece in Newton is

Question 5

A particle of mass m moving with velocity u₁ collides elastically with another particle of same mass moving with velocity u₂ in the same direction. After collision their speeds are v₁ and v₂ respectively then-
(1) u₁ + v₁ = v₂ + u₂
(2) u₁ – v₁ = v₂ + u₂

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Dec 10JEE & BITSAT