Friction, Air Resistance, and Gravity

Key Concepts in Air Resistance and Gravity

Air Resistance and Speed Relationship Notes

Kinematics

5. Helicopter Forces Given: Weight W = 53 , 800 W=53,800 N Lift force L L at 21 ∘ 21 ∘ from vertical Constant horizontal velocity → equilibrium (a) Free Body Diagram Lift L L at 21 ∘ 21 ∘ Weight W = 53 , 800 W=53,800 N downward Air resistance R R horizontally left (b) Find Lift Force L L Vertical equilibrium: L y = W L y ​ =W L cos ⁡ 21 ∘ = 53 , 800 Lcos21 ∘ =53,800 L = 53 , 800 cos ⁡ 21 ∘ = 53 , 800 0.9336 = 57 , 647  N L= cos21 ∘ 53,800 ​ = 0.9336 53,800 ​ =57,647 N (c) Find Air Resistance R R R = L sin ⁡ 21 ∘ = 57 , 647 × 0.3584 = 20 , 670  N R=Lsin21 ∘ =57,647×0.3584=20,670 N Final Answer: Lift = 57,647 N Air Resistance = 20,670 N 5. Helicopter Forces Given: Weight W = 53 , 800 W=53,800 N Lift force L L at 21 ∘ 21 ∘ from vertical Constant horizontal velocity → equilibrium (a) Free Body Diagram Lift L L at 21 ∘ 21 ∘ Weight W = 53 , 800 W=53,800 N downward Air resistance R R horizontally left (b) Find Lift Force L L Vertical equilibrium: L y = W L y ​ =W L cos ⁡ 21 ∘ = 53 , 800 Lcos21 ∘ =53,800 L = 53 , 800 cos ⁡ 21 ∘ = 53 , 800 0.9336 = 57 , 647  N L= cos21 ∘ 53,800 ​ = 0.9336 53,800 ​ =57,647 N (c) Find Air Resistance R R R = L sin ⁡ 21 ∘ = 57 , 647 × 0.3584 = 20 , 670  N R=Lsin21 ∘ =57,647×0.3584=20,670 N Final Answer: Lift = 57,647 N Air Resistance = 20,670 N

Fluid Resistance and Terminal Velocity Notes

Principles of Driving and Resistive Forces

Air and Air Pollution Notes

Air

Dynamics: Newton’s Laws of Motion, Free-Body Diagrams, and Resistive Forces

Atmospheric Stability and Air Quality Measurement Principles of Air Pollution Measurement

air pollution

Heat Transfer & Thermal Resistance Concept

Electric Resistance, Ohm’s Law, and Resistor Networks

Air Pollution

Airway Resistance II

Airway Resistance I

AIR POLLUTION

Resistance Training Study Notes

Intorduction of Thermal Resistance