3. A freight car moves along a frictionless level railroad track at constant speed. The car...

Question

Question

Answer 1

Answer #1

Answer- It decreases(C)

Reason- Using law of conservation of linear momentum,

Mv+mv_1=(M+m)V

where M- Speed of freight car,

v- Speed of car before coal is dumped into it

m-Mass of coal

V-Common velocity of car and coal

v₁=0 m/s

In case of any doubt,do ask in comments.Thanks and best of luck.

Answer 2

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