...Newton's Laws: Forces 2

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1.

A 72 kg skydiver is descending on a parachute. His speed is still increasing at 1.2 m/s2.

What are the magnitude and direction of the force of the parachute harness on the diver?

What are the magnitude and direction of the net force on the diver?



2.

Suppose you run into a wall at 4.5 meters per second (about 10 mph). Let's say the wall brings you to a complete stop in 0.5 second.
Find your deceleration and estimate the force (in newtons) that the wall exerted on you during the stopping.
Compare that force to your weight.



3.

A 200 N rock is being pulled upward with an acceleration of 3 m/s2. The net force on the rock is

200 N up

200 N down

zero

none of above





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