Question

a feather of mass 20g is dropped from a height. It is found to fall down with a constant velocity.What is the net force acting on it?

Answer 1

net force will be zero as F = ma
i. this case change i. velocity is zero so acceleration will be zero hence...
F=20 × 0 = 0 newton

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Answer 2

Answer:

The net force acting on it is $19.6\times10^{-2}\ N$

Explanation:

Given that,

Mass = 20 g

When a feather is dropped from a height with a constant velocity it means the acceleration is zero.

So, The net force acting on the feather

$F = mg+ma$

$F = 20\times10^{-3}\times9.8+0$

$F = 0.196\ N$

$F = 196\times10^{-3}\ N$

Hence, The net force acting on it is $19.6\times10^{-2}\ N$