Definitions
Device that requires a single force to work (one or two parts).
Simple machine
How many MA formulas have we studied? List one.
three
of/if eal/lal id/od
Mrs. Shannon applied a force of 20N to a tuber at Chicopee. The tuber moved a distance of 100 m. How much work did Mrs. Shannon do on the tuber?
2000J
True or false: Mechanical advantage has NO units.
True
The unit used to measure forces.
Newton (N)
What is the MA of a pulley with an output distance of 4 m and an input distance of 8 m?
2
A machine lifts an object with a weight of 40N. If the machine does 100J of work on the object, what is the distance the machine can lift the object?
2.5m
True or False: Mass is the amount of space in an object
False
Mrs. Shannon lost to this person in her grade 8 student council elections.
Marci Walters
What does a MA greater than one tell you?
Tasks are easier and faster to accomplish.
3 kJ of work is done and an object is moved 200 cm. How much force is needed?
1500 N
What is used to measure weight?
Spring scale
Examples of forces that do not require contact.
Electrical, magnetic, gravity
What is the MA of a lever with an effort arm length of 120 cm and a load arm length of 40 cm?
3
Scientifically, when is work accomplished?
When a force moves an object.
Arrow, magnitude
Ratio of output force to input force for a machine.
Mechanical advantage
How many Stanley Cups have the Habs won?
24
100 Newton metres is how many joules?
100 J