Question

What proportion of air resistance acts on a falling 100-N box of nails when it reaches terminal velocity?

Answer 1

Hint : Air resistance may be a sort of friction between air and another material. for instance , when an aeroplane flies through the air, air particles hit the aeroplane making it harder for it to maneuver through the air. it is the same for an object moving through water.

Complete Step By Step Answer:
For simplicity's sake, let's assume that only two forces are working on the box of nails: the 100 N weight of the box (the force of gravity) and air resistance.
Now, if the box of nails reaches speed, it'll travel at a continuing velocity. Travelling at a continuing velocity means the box will not accelerate, so no more force are going to be applied thereto (according to Newton's second law of motion).
Following the law, internet force on the box must be adequate to zero. Therefore, if the load of the box of nails is 100 N, the quantity of air resistance must even be 100 N.
So, net force=100 N −100 N=0 N.
At speed, air resistance equals in magnitude the load of the falling object. Because the 2 are oppositely directed forces, the entire force on the thing is zero, and therefore the speed of the thing has become constant.

Note :
With air resistance, acceleration throughout a fall gets but gravity (g) because air resistance affects the movement of the falling object by slowing it down. what proportion it slows the thing down depends on the area of the thing and its speed.