Tag Archives: Momentum
A ‘m’ kg fish swimming at 2 m/s …
A ‘m’ kg fish swimming at 2 m/s catches a ‘m/9’ kg fish coming towards it from opposite direction swimming at 3 m/s. The velocity of the larger fish immediately after the grab is:
(A) $1.5 \hat i $ m/s
(B) $2.1 \hat i $ m/s
(C) $-1.5 \hat i $ m/s
(D) $-2.1 \hat i $ m/s
A small object is projected vertically …
A small object of mass m is projected vertically upwards. Its rate of change of momentum $\frac {dp_y}{dt}$ at some instant as it moves upwards ignoring air resistance is given by,
(A) mg
(B) -mg
(C) 0
(D) 2mg
Centre of Mass, Momentum, Collision – 12 Classes
12 Classes are embedded below.
Raindrop – Variable Mass
Consider a raindrop falling through a cloud of tiny water droplets. Some of these tiny droplets get attached to this raindrop as it falls increasing its mass. Assume constant growth in the mass of the raindrop as a function of distance x of fall. Find out the acceleration of the raindrop assuming it to be constant.
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