1. change the size of the force (eg. lots of cranking of car jack to lift car small amount). 2. change the speed 3. change direction of force (simple pulley - force one way, resistance moves in other direction)
Generally, this is done by using the so-called, simple machines:LeverWheel and axlePulleyInclined planeWedgeScrewTheir tools are designed to appropriately use the above mentioned simple machine ideas.
There are several different types, but they all reduce to forms of leavers where a large-weak motion is converted into a small-strong motion. Some use worm gears, some a simple lever (which needs a ratchet), some hydrolics.
A simple sentence from instructions on how to jumpstart a car battery could be: "Connect the red cable to the positive terminal." This sentence contains a subject and a verb, conveying a complete thought without any additional clauses. Simple sentences like this are effective for clear and straightforward instructions.
It's a physical change. You can, theoretically, turn a car fender back into a flat sheet of steel. You wouldn't want to, and the machine you'd need to do it would be immense, but you could.
yes
A wheel and axle
no, it is a complex machine. Lever, wedge and inclined plane are examples of simple machines.
Pulley
Wheel and axle
Pulley
A car's windshield is not a simple machine. It is a component of the car's structure designed to protect occupants from debris, wind, and weather.
No. A car is a complex machine.
A toy car can be considered a compound machine as it is made up of multiple simple machines working together. Some simple machines that can be found in a toy car include wheels and axles for movement, and gears to transfer energy.
A yo-yo
wheel and axil
A winch.