Answer:
C) 464 N
Explanation:
The equation of the forces acting on the skydiver is:
[tex]mg-R=ma[/tex]
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:
[tex]r=mg-ma=m(g-a)=(80)(9.8-4.0)=464 N[/tex]
