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WorksheetsWork, Power, and Simple Machines
Total questions: 20
Worksheet time: 2hrs 40mins
Name
Class
Date
1.
According to the scientific definition, in order for work to be done what has to occur?
a)
Exercise
b)
Steam
c)
Electricity
d)
Movement
2.
What two things do you need to know to calculate work?
a)
force and gravity
b)
distance and mass
c)
gravity and mass
d)
force and distance
3.
What does the work done on an object depend on?
a)
direction of force applied and direction of the motion
b)
direction of gravity and speed of object
c)
speed of object and air resistance
the angle of elevation and steepness of hill
the angle of elevation and steepness of hill
d)
weight of object and angle of force
4.
What does weight measure?
a)
Mass of an object
b)
Downward force of gravity
c)
Upward force of air resistance
d)
Matter inside an object
5.
What is another name for a newton-meter?
a)
Newter
b)
Joule
c)
Kilogram
d)
Liter
6.
The rate at which work is done is called ____________________ .
a)
Power
b)
Kinetic Energy
c)
Potential Energy
d)
Watts
7.
In the work equation, what unit is measures power?
a)
Joules
b)
Kinetic Energy
c)
Potential Energy
d)
Watts
8.
The ratio of output work to input work is called _________________ .
a)
Really hard work
b)
Efficiency
9.
What is a machine that uses only one movement called?
a)
Simple
b)
Basic
c)
Complex
d)
Compound
10.
Name the type of machine that is described: something that uses a rope and can change the direction of a force.
a)
Screw
b)
Wheel and axle
c)
Lever
d)
Pulley
11.
Name the type of machine described: something that can hold things together or lift an object.
a)
Screw
b)
Wheel and axle
c)
Lever
d)
Pulley
12.
Which is NOT an inclined plane?
a)
Stairs
b)
Ramp
c)
Ladder
d)
Knife
13.
Which is NOT a wheel and axle?
a)
Doorknob
b)
Hammer
c)
Bike peddle
d)
Screwdriver handle
14.
Simple machines have:
a)
few or no moving parts
b)
exactly two moving parts
c)
many moving parts
d)
an engine
15.
What kind of inclined plane requires less force?
a)
A short, steep ramp
b)
A short, steep ramp with a curved top
c)
A long, gradual ramp
d)
A ramp with ridges, doesn't matter steepness
16.
What is the term that is used to describe the tendency of objects to remain at rest or in motion?
a)
inertia
b)
forces
c)
energy
d)
power
17.
What is the purpose of a simple machine?
a)
to change potential energy to kinetic energy
b)
to produce inertia
c)
to make work easier and use less force
d)
to test if forces are balanced
18.
The resistance to motion created by two objects rubbing against each other is called:
a)
friction
b)
inertia
c)
gravity
d)
static
19.
A book sitting on the top shelf of a bookcase has what type of energy?
a)
unmovable
b)
electric
c)
kinetic
d)
potential
20.
A skier zooming down a slope has what type of energy?
a)
moving
b)
electric
c)
kinetic
d)
potential
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