Mechanical Formulas

Mechanical Advantage = Load/Effort
Velocity Ratio
1. Gears = Number of teeth driven / Number of teeth driver
2. Compound Gears
  1. Gear Ratio = (Number of teeth on B / Number of teeth on A) x (Number of teeth of D / Number of teeth on C)
3. Pulleys = Diameter of driven pulley / Diameter of driver pulley
4. Chain and Sprocket = Number of teeth driven sprocket / Number of teeth driver sprocket
5. Levers = Distance moved by effort / Distance moved by load
Efficiency = Mechanical Advantage / Velocity Ratio
Force (N) x Distance (Metres) = Torque (Nm)
1. Input Torque = Turning Force x Pulley Radius
2. Output Torque = Input Torque x Velocity Ratio
3. In rotary systems the turning effect of a force is known as torque
Moment of a force = Force x Perpendicular Distance
1. A moment is a turning force
2. Clockwise Moments = Anticlockwise Moments
Potential Energy = Mass of object x Acceleration of gravity (9.8 m/s2) x Height of object
Kinetic Energy = half mass (1/2) x velocity squared
Power = Work Done / Time Taken
1. Watt: The unit of power. 1 watt = 1 joule per second
2. Power (Watts) = Torque (Nm) x Angular Velocity (Rad/s)
Output Speed = Input Speed / Velocity Ratio

Resource summary

	Created by Jamie_472 almost 11 years ago