Simple Machines Flashcards
What is force?
Force is a push or pull exerted on an object to change the object’s velocity.
What is the fulcrum of a lever?
The fulcrum is a fixed point in a lever.
What is a lever?
A lever is a simple machine that magnifies either force or motion.
What is effort?
Effort is the force applied to a simple machine.
What is resistance?
Resistance is the weight the machine is manipulating.
What is mechanical advantage?
Mechanical advantage is the amount by which a simple machine magnifies force or motion.
Mechanical Advantage for the Lever
Distance from fulcrum to effort/Distance from fulcrum to resistance
Describe a first class lever.
In a first class lever, the fulcrum is between the effort and the resistance.
This kind of lever magnifies force.
Describe a second class lever.
In a second class lever, the resistance is between the fulcrum and the effort.
This kind of lever multiplies force.
Describe a third class lever.
In a third class lever, the effort is between the fulcrum and the resistance.
This kind of lever multiplies distance.
Mechanical Advantage for the Wheel and Axle
Diameter of the wheel/Diameter of the axle
What is a pulley?
A pulley is a grooved wheel that rotates freely on a frame.
What is a block and tackle?
A block and tackle is a multiple pulley system.
Mechanical Advantage for the Block and Tackle
The number of pulleys used.
What is an inclined plane?
An inclined plane is a slope or a ramp.
