WorksheetsWork and Simple Machines
Total questions: 40
Worksheet time: 40mins
The fixed point that a lever moves around is called a
load
resistance
bar
fulcrum
A flat supporting surface tilted at an angle, with one end higher than the other, used as an aid to raise and lower a load.
Simple Machine
Inclined Plane
Rise
Mechanical Advantage
Power is measured in
m/s2
Joules
watts
F
What is the unit for work?
Watts
Kilograms
Joules
Newtons
Energy is the ability to cause change or do work.
True
False
You do work ONLY when you exert a force on an object and it moves in that direction.
true
false
Which of the following is the best example of work being done?
reading one page of a book
lifting a box up from the floor
pushing against a wall
holding a box while standing
_______________ is done when a force acts on an object and the object moves in the direction of the force.
Work
Kinetic energy
Watt
Joule
The unit for work (aka Newton-meter)
Watt
Power
Work
Joule
________________ is the rate at which work is done.
Power
Work
Time
Energy
Energy that is stored and held in readiness
Kinetic
Mechanical
Work
Potential
Kinetic energy is the energy of ___________.
Distance
Motion
Work
Roman
Energy cannot be ________ or ___________ (in normal reactions)
big/small
left/right
created/destroyed
made/transferred
What is an example of work being done?
throwing a ball
standing there holding a ball
looking at a ball
paying for a ball on Amazon
The head of an axe is an example of a
pulley
inclined plane
screw
wedge
A device that uses two or more simple machines working together to do more complex tasks
fulcrum
pulley
compound (complex) machine
motor
Lightbulb base
wedge
pulley
incline plane
screw
Which of the following can a simple machine do?
changes the amount of force needed
changes the distance over which a force will act
change the direction of the applied force
all of the above
A simple machine that can split things apart or hold a door open. It is a pair of inclined planes back to back.
wedge
screw
lever
An ideal (perfect) machine would have an efficiency of
0%
6%
50%
100%
What measures the rate of a machine's work output to its work input?
A spring scale
Mechanical advantage
Mechanical efficiency
Newton-meter
A number that tells how many times a machine multiplies force is its
newton-meter
joule
mechanical advantage
mechanical efficiency
When you raise your leg, what acts as the fulcrum for your thighbone?
Ankle
Hip
Shoulder
Neck
