Answer:
563.86 N
Explanation:
We know the buoyant force F = weight of air displaced by the balloon.
F = ρgV where ρ = density of air = 1.29 kg/m³, g = acceleration due to gravity = 9.8 m/s² and V = volume of balloon = 4πr/3 (since it is a sphere) where r = radius of balloon = 2.20 m
So, F = ρgV = ρg4πr³/3 
substituting the values of the variables into the equation, we have
F =  1.29 kg/m³ × 9.8 m/s² × 4π × (2.20 m)³/3 
= 1691.58 N/3 
= 563.86 N
 
        
             
        
        
        
Answer:
616.223684211 N
Explanation:
 = Resistive force on the wheel = 115 N
 = Resistive force on the wheel = 115 N
F = Force acting on sprocket
 = Radius of sprocket = 4.75 cm
 = Radius of sprocket = 4.75 cm
 = Radius of wheel = 25 cm
 = Radius of wheel = 25 cm
Moment of inertia is given by

Torque

Torque is given by

The force on the chain is 616.223684211 N