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Practice
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Homework Statement
You wish to put your fridge on the second floor of your house (again).
You decide to rig up a pulley system so as to not overexert yourself.
Your maximum force is 250N and the fridge weighs 950N.
a) diagram a pulley system using the fewest number of pulleys, which can achieve
this feat
b)The fridge must be raised 2.4 m, how far must you pull the rope?
(Hint: you can still calculate this without the diagram)
c) Calculate the work done using the pulley system and the work you
would have done without the pulley system.
d) What is the IMA of the system?
Homework Equations
W=F*D
P= W/t
AMA= FL/FA
IMA= DA/DL
EFFICIENCY= (work done by machine/work done on machine)x 100
or
EFFICIENCY= (AMA/IMA) * 100