Question

6. A rain drop of mass 0.1 gm is falling with uniform
speed of 10 cm s-1. What is net force acting on the
drop :-
(a) Zero
(b) 2x10-'N
(c) 10 'N
(d) 10-N​

Answer 1

Answer:

a) 0

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Answer 2

As the speed is uniform and not changing, the acceleration is zero. This means that the net force will be zero too.

Force = Mass x Acceleration

The raindrop moves at uniform velocity, which is the same as saying its acceleration is 0.

The net force is therefore also 0.

This means that the two forces acting on the raindrop (gravity and air resistance) have equal magnitudes in opposite directions.