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Inclined planes

Hamza Ahmed Inglés 5,0Valoración media 5,0 de 5 (1 valoración) 20 fichas

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1Inclined PlanesHamza Ahmed
Year 8
2What are inclined planes or ramps?A sloping ramp up which heavy loads can be lifted.
3What do ramps do?It makes us use much less force to do
a very difficult task but with more distance to cover.
4What is an example of a ramp?A winding road up a hill, it makes the journey much safer when going down but increases distance.
5What are wedges?A piece of wood, metal, etc. having one thick end and a thin, sharp edge, which drives between an object to separate it.
6What are wedges used for?They're used for splitting objects, like cutting down trees or biting into an apple.
7What are some examples of wedges?
8What makes a wedge more productive?The sharper and the longer it is
9How do you work out the mechanical advantage of a ramp?Mechanical advantage=
Length of slope
-----------------------
height of slope
10A crate on a 10 m ramp is pushed into a doorway 2 m above the ground. What is the mechanical advantage10 ÷ 2 = 5
Mechanical advantage = 5
11What are zips?A simple machine consisting of two strips of metal or plastic with interlocking projections.
12What are some examples of zips?Clothing, purses and wallets
13How do zips work?A central wedge unlatches the teeth as the zip is undone and side wedges force the teeth together when the zip is done.
14What are screws?A spiral shaped inclined plane
15What are some types of screws?Wood screws
Air propeller screws
Boat propeller screws
16What are they used for?Wood screws are for cutting timber
Air propeller screws are for cutting air
Boat propeller screws are for cutting water
17How do screws work?As a screwdriver turns a screw, the material moves a long the spiral ramp. The spiral is called the thread.
18What is a small pitch?When the threads are much closer to each other, needing more turns, less force.
19What is a large pitch?When there's a lot of space between the threads, less turns, more force.
20The EndThank You