Terms in this set (17)
A device that reduces the amount of force needed to perform a task or changes the direction of a force.
A device that makes work easier
A result of a force moving an object a certain distance in the direction of the applied force.
W = F • d, work= force x distance
Six Simple Machines
Inclined Plane, Wedge, Screw, Lever, Wheel and Axle, and Pulley
A flat surface set at an angle used to help raise or lower objects. Such as a ramp that reduces the amount of force required to do work. Ex: ramp, slide
An inclined plane wrapped around a cylinder that increases effort force Ex: screw, cork screw
A simple machine that is made up of two inclined planes back to back; often used for cutting. Ex: knife, doorstop
a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or multiply a force exerted by a rope or cable Ex: flagpole
Wheel and axle
Two different sized circular objects that are attached together and turn as one. Ex: bike, doorknob
A simple machine that consists of a bar, rod, or plank that pivots at a fixed point called a fulcrum. It is used to lift or open things. Ex: crowbar, bottle opener, seesaw
The force you exert on a machine
The force exerted on an object by a machine
The amount by which a machine multiplies the effort force.
Units for Work
Force equation when given work
Force = work / distance, F = W/d
Distance equation when given work
Distance = work / force, d = W/F