Simple Machines

Created by:

josephdroot  on August 12, 2012

Description:

Levers, Inclined Planes, Pulleys, Gears

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Simple Machines

 ShorterIf the distance between the thread on a screw is large, would it take a longer or shorter time to screw it into a piece of wood?
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Shorter If the distance between the thread on a screw is large, would it take a longer or shorter time to screw it into a piece of wood?
Thread What is the name of the inclined plane that wraps around a screw?
2nd If the load is in the middle of the fulrum and the effort what is its class; 1st, 2nd or 3rd?
3 Calculate the mechanical advantage of a lever with an effort arm length of 6 metres and a load arm length of 2 metres.
Speed If the gear ratio is greater than 1 is it a speed or force multiplier?
Force If a lever's mechanical advantage is greater than 1 is it a speed or force multiplier?
2nd
What class of lever is this; 1st, 2nd or 3rd?
3rd
What class of lever is this; 1st, 2nd or 3rd?
Bevel
What type of gears are shown here?
Pulley
What type of simple machine is this?
Wedge The head of an axe is what type of simple machine?
Less When a gear acts as a force multiplier, the driver has MORE/LESS teeth than the follower.
Less A force multiplier has a gear ratio MORE/LESS than 1.
Faster In a force multiplier, the driver gear turns FASTER/SLOWER than the follower.
More When a machine acts as a speed multiplier, the driver has MORE/LESS teeth than the follower.
More A speed multiplier has a gear ratio MORE/LESS than 1.
Slower In a speed multiplier, the driver turns SLOWER/FASTER than the follower.
Opposite When two gears are meshed together, the 2nd gear goes in the SAME/OPPOSITE direction to the first gear.
Small driver-large follower The gear combination that produces the greatest force is SMALL DRIVER-LARGE FOLLOWER/LARGE DRIVER-SMALL FOLLOWER?
Large driver-small follower The gear combination that produces the greatest speed is SMALL DRIVER-LARGE FOLLOWER/LARGE DRIVER-SMALL FOLLOWER?
Increasing An inclined plane makes work easier by INCREASING/DECREASING the distance.
Both An axe is an example of a LEVER/WEDGE/BOTH/NEITHER
Double A 2 pulley system will halve the amount of force required to lift an object. This will result in pulling the string HALF/DOUBLE the distance of the object.
More A screw with a very small distance between its thread will take MORE/LESS time to screw in than one with a more widely spaced thread.
Less A screw with a very small distance between its thread will take MORE/LESS effort to screw in than one with a more widely spaced thread.
More A pulley with 3 support strings will require MORE/LESS effort than a pulley with 4 support strings.
Can A simple machine CAN/CANNOT both change the direction and the size of the force at the same time.
Increase Increasing the angle of a ramp will INCREASE/DECREASE the effort required to pull up a trolley.
Dependent In an experiment looking at the affect of ramp height on the force required to pull up a trolley, the force would be the DEPENDENT/INDEPENDENT variable?
Y In an experiment looking at the affect of different number of pulleys on the force required to pull up a load, the amount of force would be graphed on the X/Y axis?
Independent In an experiment looking at the affect of different number of pulleys on the force required to pull up a load, the number of pulleys would be the DEPENDENT/INDEPENDENT variable?
X In an experiment looking at the affect of ramp height on the force required to pull up a trolley, the ramp height would be graphed on the X/Y axis?
Harder Is it easier or harder to pull a load up a steep inclined place compared to a more gentle slope?
Worm
If a worm gear was meshed with a toothed gear (as in the diagram), which one would have to be the driver for the machine to work? Worm or tooth?
C
If each pulley's string was pulled 10cm, which load would be lifted by the least distance?
A
Which pulley system would require the most effort?
3
Calculate the mechanical advantage of this lever
1st
What class of lever is this - 1st, 2nd or 3rd?
Force
Is this lever an example of a force or a speed multiplier?
4
Calculate the mechanical advantage of this pulley system.
Force
Is this pulley system a force or speed multiplier?
5
If the effort string was pulled 20cm, the load would be lifted by what distance? ......cm
Spiralled inclined plane What type of simple machine is a cork screw?
Inclined plane What type of simple machine is a car-park ramp?
Wedge What type of simple machine is a knife?
Wedge A .............. can also be described as a double inclined plane.
Lever What type of simple machine is a set of chopsticks?

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