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WorksheetsMechanical Advantage & Levers
Total questions: 21
Worksheet time: 1hrs 15mins
70 J
1750 J
355 J
the transfer of energy or force acting over a distance
rate of work in a given time
the change in distance in a given time
120 N
5 N
2000 N
work.
output force.
mechanical advantage.
the rate at which work is done
power
work
machine
the percentage of the input work that is converted to output work
mechanical advantage
Mechanical efficiency
joule
45 J
0 J
5 J
The _________ of a machine is always less than 100% because of conversion to other forms of energy (like sound thermal energy from friction)
mechanical advantage
friction
mechanical efficiency
Simple machines help make work _________.
Less
Harder
Easier
a rigid bar that is free to pivot, or rotate, on a fixed point
wedge
lever
fulcrum
1st Class
2nd Class
3rd Class
Jeff is a landscaping contractor and lifts a rock weighing 600 pounds by wedging a board under the rock. Jeff weighs 150 pounds and puts all of his weight on the lever. What was his MA?
0
2
4
Mechanical advantage tells you how many times your ____ is multiplied
efficiency.
effort force.
work.
This 2000 N weight is raised 1 meter by pulling 4 meters of rope. What force was required to pull the rope?
500 N
2000 N
8000 N
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
