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WorksheetsMechanical Advantage of Levers
Total questions: 34
Worksheet time: 40mins
What is mechanical advantage?
The advantage a machine has over a bicycle
A measure of how much a complex 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
What is effort (input) force?
the force one exerts on a machine
the force which an effort force must overcome in order to do work on an object via a simple machine.
the force the machine exerts on a object
the output work times the input distance
What is the output force?
the force required by a machine in order to accomplish work (the force you put on the machine)
The force that is exerted by a machine
the force the machine exerts on a object
the output work times the input distance
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=Effort Arm/Load arm)?
0.5
2
3
6
Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever ?
1
10
100
1000
Jeff is a landscaping contractor and lifts a rock weighing 600 Newtons by wedging a board under the rock. Jeff weighs 150 Newtons and puts all of his weight on the lever. How much mechanical advantage did the lever provide to Jeff in lifting the rock?
0
2
4
0.25
Difficult Question:You need to lift a 100N box off the ground. What is the effort required to lift the box off the ground using a 3m long lever? [The fulcrum is placed 0.5m from the box.] *Tip: You will need to use two formulae
5 N
20 N
50 N
80 N
In a simple machine, what is the load?
point where the lever arm pivots
the force needed to move the load
the mass lifted by a system
the distance the load travels
In a simple machine, what is the effort?
the force needed to move the load
the distance the load travels
the mass lifted by a system
the object being moved
What is the unit used to measure force?
meter
gram
Newton
liter
What is the point where the lever arm pivots?
load
fulcrum
mass
effort
In a class 1 lever system, what happens to the effort when the load moves away from the fulcrum?
effort decreases
effort increases
effort stays the same
effort changed direction
What class lever is pictured below?
Class-1 &3
Class-3
Class-2
Class-1
which lever type is a wheel barrow?
type 1
type 2
type 3
none of them
If I have a wedge with a MA of 5 and an output distance of 2, than what is the input distance?
10
100
1000
10000
A lever used to lift a heavy box has an input arm of 4 meters and an output arm of 0.8 meters. What is the mechanical advantage of the lever?
1
2.5
5
10
What is the mechanical advantage of a lever that has an input arm of 3 meters and an output arm of 2 meters?
1.5
1
0.67
3
A lever with an input arm of 2 meters has a mechanical advantage of 4. What is the output arm’s length?
2m
0.5
0.5m
8
A lever with an output arm of 0.8 meter has a mechanical advantage of 6. What is the length of the input arm?
7.5m
4.8m
6m
8m
A rake is held so that its input arm is 0.4 meters and its output arm is 1.0 meters. What is the mechanical advantage of the rake?
0.4
1
1.4
2
A broom with an input arm length of 0.4 meters has a mechanical advantage of 0.5. What is the length of the output arm?
2m
1.5m
1m
0.8m
A child’s toy rake is held so that its output arm is 0.75 meters. If the mechanical advantage is 0.33, what is the input arm length?
0.75
0.33
0.2475
0.6
A ramp with a mechanical advantage of 6 is used to move a 36-newton load. What input force is needed to push the load up the ramp?
2
4
6
8
The effort arm is...
called a bicep.
measured from the fulcrum to the effort.
measured from the load to the fulcrum.
called the output arm
The output arm is...
the load arm.
the input arm.
mechanical advantage multiplied by effort arm.
measured from the fulcrum to the input.
