Inclined Plane, Wedge, Screw
This simple machine is a flat surface set at an angle, allowing objects to be lifted by pushing or pulling.
What is an inclined plane
This simple machine consists of a rigid bar that pivots on a fulcrum and can be classified as first, second, or third class.
What is a lever
This term refers to the energy transferred when a force is applied to an object moving through a distance.
What is work
This term refers to the torque at which a motor stops spinning completely.
What is stall torque
This type of mechanism uses interlocking teeth to transmit rotary motion and torque between shafts.
What is a gear train
If a mechanism has a mechanical advantage of 4:1, the effort force is this many times less than the resistance
What is four times less
A second-class lever always has a mechanical advantage in this range compared to 1.
What is greater than 1
This law states that energy cannot be created or destroyed, only transformed from one form to another.
What is the law of conservation of energy
When a motor runs with no load, it spins at this speed.
What is the no-load speed
When two gears mesh, they always rotate in these relative directions.
What are opposite directions
A wedge functions as this type of simple machine, tapering to a thin edge for splitting or tightening.
What is a moving inclined plane
If the wheel drives the axle and the wheel’s diameter is 20 inches while the axle’s diameter is 6 inches, the ideal mechanical advantage is approximately this value.
What is 3.33:1
The SI unit for power is the watt, which equals this many joules per second.
What is 1 joule per second
Motor power is calculated by multiplying these two quantities together.
What are torque and angular speed
If a driver gear has 6 teeth and the driven gear has 12 teeth, the gear ratio is this value.
What is 2:1
The ideal mechanical advantage of a screw is calculated by dividing the circumference of the effort arm by this measurement.
What is the pitch
The ideal mechanical advantage of a block and tackle pulley system equals this quantity related to the strands of rope.
What is the number of strands opposing the load
Efficiency is calculated by dividing output energy by input energy and multiplying by this number to express it as a percentage.
What is 100
A motor delivers maximum power when operating at this fraction of its stall torque.
What is one-half of the stall torque
In a compound gear train, the total gear ratio is found by performing this mathematical operation on the individual gear ratios.
What is multiplying them together
A screw with an IMA of 1005 and an AMA of 34 has an efficiency of approximately this percentage.
What is 3.4%
A pulley system with an AMA of 3.48 and an IMA of 4 has an efficiency of approximately this percentage.
What is 87%
In a hydroelectric power plant, gravitational potential energy is first converted into this type of energy before becoming electrical energy.
What is mechanical energy
If a motor’s stall torque is 4.2 lb·in, what torque should it deliver for maximum power?
What is 2.1 lb·in
Unlike a belt and pulley system, a sprocket and chain system has this key advantage
What is no slip