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WorksheetsMachines and mechanical Advantage
Total questions: 22
Worksheet time: 29mins
Suzy finds that a lot of effort is needed to lift the load in the above diagram. How can Suzy use less effort to lift up the load?
Use her leg to press.
Move the position of the fulcrum perpendicular to the effort
Move the fulcrum behind the load
Move the fulcrum nearer to the load
A simple machine that splits an object apart is a _______.
inclined plane
fulcrum
wedge
lever
A wheelbarrow is an example of a complex machine. Which simple machine is NOT found in this object?
lever
wedge
wheel and axle
What is mechanical advantage?
The advantage a machine has over a bicycle
A measure of how much a simple machine reduces work
A measure of when is the best time to use a simple machine
the number of times a machine increases input force
If the distance from the effort to the fulcrum is greater than the distance from the load to the fulcrum, then
the effort has a mechanical advantage
the lever has a mechanical advantage
the fulcrum has a mechanical advantage
What is the mechanical advantage of a pulley system that looks like this?
5
8
1
2
You push down on a lever with a force of 100 N to lift a 500 N box.
What is the input force?
100 N
500 N
Which machine works by changing the direction of a force?
A rake
A pulley
A screwdriver
Why is efficiency always less than 100%?
There is always some friction which takes away from 100%
Because a machine is always stronger than a human
Because machines make things go slower.
Mechanical advantage= (a) / (b)
The mechanical advantage of this inclined plane is...(MA=Resistance Force/Effort Force)
2.4
3.4
4.4
A force of 50 N is applied to the end of a lever to lift a rock that is 350 N. What is the MA of the lever?
70
0.14
7
17,500
