The force exerted must be 0.65N
Explanation:
Given:
Mass, m = 65 kg
Height, h = 9m
Time, t = 30 seconds
Force, F = ?
We know:
distance = speed X time
9 = s X 30
s = 0.3 m/s
Acceleration, a = [tex]\frac{speed}{time}[/tex]
[tex]a = \frac{0.3}{30} \\\\a = 0.01 m/s^2[/tex]
Force = mass X acceleration
Force = 65 X 0.01 N
F = 0.65N
Therefore, the force exerted must be 0.65N
