7. what is the force of air resistance on an
2.02 80-kg sky diver who is falling downward
with an acceleration of 4.0 m/s ?
a 320 n
b 392 n
( 464 n
d. 784 n

C) 464 N

Explanation:

The equation of the forces acting on the skydiver is:

where

(mg) is the weight of the skydiver, acting downward, with

m being the mass of the skydiver

g is the acceleration of gravity

R is the air resistance, acting upward

a is the acceleration of the skydiver

In this problem:

m = 80 kg

g = 9.8 m/s^2

a = 4.0 m/s^2

Solving the equation for R, we find the force of air resistance:

f=ma newton's second law 7x8=56n

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000