
Work + Efficiency practice
Authored by Ethan Mansfield
Physics
9th - 12th Grade
CCSS covered
Used 1+ times

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22 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is the ideal mechanical advantage of an inclined plane which has 4 cm height and 16 cm slope?
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is the efficiency of a machine if 55.3 J of work are done on the machine, but only 14.3 J is produced by the 1machine?
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is the efficiency of the machine if the input is 263 J and the output is 142 J?
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A machine has a work output of 8 joules and requires 10 joules of work input to operate. What is the machine's efficiency?
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
What is the mechanical efficiency of a machine whose work input is 250 J and work output is 30 Joules??
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
If the weight of the block is 10N, how much force does one have to apply to lift it using this pulley (MA=2)?
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
A box of weight W is lifted by a force F using a lever as shown below.
What is the mechanical advantage of the lever (MA=Input Distance/Output Distance)?
0.5
2
3
6
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