Work, Power and Simple Machines
Terms in this set (30)
Wheel and Axle
An example is a screwdriver
Inclined plane wrapped around a cylinder
A lever rotates on this fixed point
See-Saw is an example of this
A machine made from two or more simple machines
A rope or chain wrapped around a grooved wheel
Flat, Slanted Surface
This is thick on one end and tapers to a thin edge at the other end
The transfer of energy to an object by a force that makes an object move in the direction of the force
Unit of measure for force
Unit of measure for distance
Rate at which work is done
A device that makes doing something easier.
Ratio of output force to the input force of a machine
Examples of Work include
Throwing a ball or lifting a weight in the air
Examples of Work NOT being done
Standing still or a book sitting on a table
A sloping hill or road is an example of which simple machine?
Tweezers, hammers, and baseball bats are examples of which class of lever?
3rd class lever
Screwdriver, door knob, pizza cutter are examples of which simple machine?
wheel and axle
Where is the fulcrum located on a 1st class lever?
Between the effort and the load
Bottle cap openers and wheelbarrows are examples of which class lever?
2nd Class Lever
A simple machine that can be used to split things apart or hold objects together.
Where is the effort located on a 3rd class lever?
Between the fulcrum and the load.
What is another term that can refer to the load?
What is another term that can refer to the effort?
Cranes, blinds, and elevators are all examples of which simple machine?
Jar lids, drill bits, and light bulbs are all examples of which simple machine?
Crowbars, rowing oars, and paint can openers are examples of which class of lever?
1st class lever
An inclined plane makes work easier by doing what to the distance?
Increasing the distance
The unit for power. Also called Joule per second. (J/s)