Falling Ball

Classical Mechanics Level 3

A ball is falling towards Earth close to Earth's surface. Does the ball speed up or slow down during its fall?

Note : The ball experiences a drag force given by F ⃗ d r a g = − k v ⃗ \vec{F}_{drag} = -k \vec{v} . The equation tells us that the direction of the drag force is proportional and opposite to the velocity of the ball.

It depends on its initial velocity It speeds up It slows down It first speeds up, then slows down.

Pranshu Gaba by Pranshu Gaba , 22, India

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1 solution

Md Zuhair
Feb 23, 2017

It depends on the initial velocity because more the initial velocity at firt, more is the drag at opposite direction and vice versa... So the ans it that it depends upon initial velocity

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