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Classical Mechanics Level 2

a feather is dropped from a height of 478567 metres above the ground the mass of the
feather is 123grams . It was travelling with constant velocity .consider G=10m/s CALCULATE THE force!


The answer is 0.

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Arko Roychoudhury by arko roychoudhury , 20, India

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3 solutions

Caleb Townsend
Feb 17, 2015

Assuming the asker wants to know the net force...
Σ F = m d v d t \Sigma F = m\frac{dv}{dt} We were told the velocity is constant, so d v d t = 0 \frac{dv}{dt} = 0 Therefore Σ F = 0 \boxed{\Sigma F = 0}

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Rama Devi
May 13, 2015

The force is zero because the body has constant acceleration.

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if a body is travelling with constant velocity the acceleration is zero

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