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WorksheetsWork, Power, & Simple Machines Test 2/14/25
Total questions: 50
Worksheet time: 38mins
Where should the fulcrum be placed in order for the student to use the least amount of effort possible:
further away from the load
closer to the load
in the center between the effort and load
it doesn't matter
The correct unit to measure power is..
Joule
Newton
Watt
Pascal
In which case is work being done:
a student sleeps
a student carries his chair across the room
a student pushes a locked door that doesn't move
a student picks up his chair
If you use a crowbar to get a lid off a bucket, which simple machine are your using?
inclined plane
wheel and axle
pulley
lever
What type of simple machine is found on the lid of a pickle jar?
lever
screw
pulley
wedge
A flagpole or blinds on a window would be an example of which simple machine:
pulley
wedge
inclined plane
screw
Calculate the amount of work done if you use 100 Newtons of force to push a box 5 meters across the kitchen floor.
250 J
5000 J
500 J
50,000 J
The rate at which work is done is
power
potential energy
kinetic energy
work
Which of these simple machines changes the direction of your force:
wedge
fixed pulley
inclined plane
wheel and axle
No machine can be 100 % efficient because of
waste energy
thermal energy
convetion energy
friction
Which of the following shows work being done:
pushing a wall
holding a box
picking up a pencil
sitting in a chair
Which of these would show the most power
picking up a light object in a long amount of time
holding a heavy object for a long time
picking up a heavy object in a short amount of time
picking up a light object in a short amount of time
Which of the following would be an example of a wedge:
a knife
stairs
a skateboard
a broom
Applying a small force over a long distance can be exchanged with..
a small force over a small distance
a large force over a small distance
a large force over a long distance
You cannot change the amount of force you apply
When using an inclined plane,
you do less work
you do the same amount of work, it is just easier
units for work are
newtons
joules
meters
seconds
A machine with a 5-N input force and a 25-N output force has a mechanical advantage of?
2
5
20
125
The mechanical advantage of a pulley system depends upon?
The diameter of the pulley wheels
The length of the rope
The number of sections of rope
The direction of the input force
No machine can be 100% efficient because of
Thermal energy
Waste energy
Convection energy
Friction
Which is not considered a simple machine?
The pump
The wheel & axle
The wedge
The screw
The pulley
Which is not a simple machine?
Wedge
screw
lever
fulcrum
The Mechanical Advantage (MA) of a simple machine makes work
Easier
Harder
No difference to the work done
None Of the above
What is work defined as in physics?
The force that opposes motion between two touching surfaces.
The distance an object travels.
The force applied on a machine.
When a force causes an object to move in the same direction that the force is applied.
How is power related to work?
Power is the force that opposes motion.
Power is the distance work can cause an object to move.
Power is how quickly work is done.
Power is the force applied by a machine.
What is the mechanical advantage of a machine?
The ratio of the input work to the output work.
The ratio of the output force to the input force.
The ratio of the input force to the output work.
The ratio of the output work to the input work.
What is a simple machine?
A machine that is easy to use.
A machine that does work with only one movement.
A machine made up of several parts.
A machine that requires electricity to operate.
Which of the following is an example of an inclined plane?
Lever
Wedge
Screw
Compound machine
What is the function of a lever?
To oppose motion between surfaces.
To move objects in the same direction as the applied force.
To pivot or rotate about a point.
To wrap around a cylinder or post.
What does a wheel and axle consist of?
Two circular objects of the same size that rotate independently.
Two circular objects of different sizes that are attached and rotate together.
A grooved wheel with a rope wrapped around it.
A circular object with spokes that connect to a central point.
What is a pulley?
A circular object that rotates on a central axle.
A wheel with teeth that meshes with a chain or belt.
A grooved wheel with a rope or cable wrapped over it.
Two circular objects of different sizes that rotate independently.
When force is used to move an object across a distance, this is called...
effort
power
energy
work
If the object does not move then what is happening
nothing
work
power
no work is being done on the object
Which of the following examples has NO work being done? (Choose all that apply)
An archer stretches her bowstring.
An ant carries a leaf cutting from a tree to his colony
An athlete does push-ups on the ground
A book sits on the shelf
A machine that combines two or more simple machines
Compound Machine
machine
Simple Machine
Mechanical machine
A simple machine that is a plane or a ramp that connects a higher area to a lower area allowing you to move an object up or sown by rolling or sliding it without lifting that object directly.
Compound Machine
Inclined plane
Simple machine
A machine
The push or pull exerted on a machine
power
Lever
Joule
Input force
A simple machine made of a bar or board that pivots around a fixed point called a fulcrum
Lever
Joule
Power
Compound machine
A measurement of the efficiency of a machine expressed as a percentage; the ratio of the work output to the work input times 100
Mechanical Advantage
Mechanical Efficiency
Mechanical Machine
Mechanical Power
The mathematical unit used to describe the amount of force
Joule
Newton
Meters
Power
The push or pull that a machine exerts on an object.
Input force
Output force
Force
Power
The rate at which work is done or energy is transformed
Power
force
Joules
Newton
