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WorksheetsPS. Ch. 3
Total questions: 46
Worksheet time: 38mins
Name
Class
Date
1.
This type of force resist motion between two surfaces that are pressed together
a)
contact
b)
gravity
c)
friction
2.
The unit of force is
a)
m/s
b)
m/s^2
c)
newton
d)
kg
3.
Identify this simple machine
a)
Lever
b)
Wheel & Axle
c)
Inclined Plane
d)
Screw
4.
Two examples of a pulley...
a)
knife & axe blade
b)
lightbulb & screw
c)
flagpole hoist & window blinds
d)
catapult & teeter totter
5.
Which of the following does a simple machine do?
a)
allows the users to apply less force over a longer distance
b)
reduce the amount of force needed to do work
c)
change the direction of the applied force
d)
all of the above
6.
Which is an example of someone using a simple machine to do work?
a)
a boy runs across a football field
b)
a banker counts money
c)
a mother pushes a stroller up a ramp
d)
a girl eats a sandwich
7.
The device used to raise a flag up a flag pole is an example of a
a)
wheel and axle
b)
lever
c)
inclined plane
d)
pulley
8.
What do you call a machine made up of two or more simple machines?
a)
complicated machine
b)
compound or complex machine
c)
comprehensive machine
d)
constructive machine
9.
A simple machine that consists a rigid bar that pivot about a fixed point
a)
lever
b)
pulley
c)
wheel and axle
d)
fulcrum
10.
An axe is an example of a
a)
pulley
b)
inclined plane
c)
screw
d)
wedge
11.
A seesaw is an example of a
a)
wedge
b)
lever
c)
inclined plane
d)
pulley
12.
A device that has two or more simple machines working together
a)
fulcrum
b)
pulley
c)
compound (complex) machine
d)
motor
13.
Stairs
a)
wedge
b)
pulley
c)
inclined plane
d)
wheel and axle
14.
Lightbulb
a)
wedge
b)
pulley
c)
incline plane
d)
screw
15.
Which is not a type of simple machine?
a)
spring
b)
screw
c)
pulley
d)
wedge
16.
This device
a)
wedge
b)
lever
c)
incline plane
d)
wheel and axle
17.
The fixed point on the lever is called
a)
load
b)
resistance
c)
bar
d)
fulcrum
18.
The transfer of energy that occurs when a force makes an object move is known as
a)
effort
b)
potential
c)
kinetic
d)
work
19.
A flat sloping surface that connects lower and higher elevations. It makes raising objects easier.
a)
wedge
b)
screw
c)
lever
d)
inclined plane
20.
What is a wheel and axle?
a)
wheel that turns on a post
b)
flat surface that is higher at one end
c)
made from two or more simple machines
d)
uses a wheel and rope to lift a load
21.
What is a lever?
a)
made of 2 inclined planes that are back to back
b)
means attracted to a magnet
c)
stiff bar that rests on a fulcrum
d)
made of 2 inclined planes that are back to back
22.
How does a pulley make work easier?
a)
It changes the direction of the input force.
b)
It changes the distance over which the input force is applied.
c)
It changes the amount of the input force applied
d)
It changes direction and increases the effect of your input force
23.
What reduces the efficacy of a simple machine?
a)
Heat
b)
Friction
c)
Mechanical Advantage
d)
Input Force
24.
What is gravity?
a)
A mythical creature that only comes out at night.
b)
A force that pulls all objects off the Earth.
c)
A force that pulls all objects down to the earth.
d)
The energy needed to make an object move.
25.
True or false
You do work only when you exert a force on an object and move it
You do work only when you exert a force on an object and move it
a)
true
b)
false
26.
Two factors that determine work are
a)
size of the force, and distance
b)
size of the force, and type of force
c)
mass, and distance
27.
work is a measurement of how much force is applied over a certain
a)
distance
b)
velocity
c)
shape
d)
size
28.
units of force are
a)
netwons
b)
grams
c)
joules
d)
meters
29.
units for work are
a)
netwons
b)
joules
c)
meters
d)
seconds
30.
if you push a cart with a force of 60 N for 2 m... how much work have you done
a)
120 J
b)
30 J
c)
120 N
d)
30 N
31.
work transfers
a)
sweat
b)
energy
c)
velocity
d)
effort
32.
When you change the ? and the ? of an object you transfer energy to that object...
a)
position and speed
b)
size and shape
c)
speed and velocity
d)
distance and velocity
33.
both work and energy are measured in
a)
joules
b)
newtons
c)
meters
d)
seconds
34.
energy in motion
a)
kinetic
b)
potential
35.
stored energy
a)
kinetic
b)
potential
36.
Any device that makes work easier is called a ______________________.
a)
Joule
b)
prop
c)
lever
d)
machine
37.
A force exerted over a distance to move an object is ______________________.
a)
power
b)
work
c)
momentum
d)
Watt
38.
The efficiency of a machine can be increased by reducing __________________________.
a)
effort
b)
resistance friction
c)
fulcrum
d)
friction
39.
The unit used to measure power is the
a)
Watt
b)
Newton
c)
Joule
d)
Newton*meter
40.
Which of the following is the best example of work being done.
a)
doing homework
b)
lifting a box
c)
pushing a stationary box
d)
holding a box
41.
A 5000N block is lifted 10 m. How much work was done?
a)
50000 J
b)
5000 J
c)
500 J
d)
50 J
42.
If a pulley has a mechanical advantage of 3. How much force is needed to lift a resistance of 90 N?
a)
3N
b)
90N
c)
180N
d)
30N
43.
What type of inclined plane has the greater mechanical advantage?
a)
Higher.
b)
Flatter.
c)
Oiled.
d)
Sticky.
44.
Work done = Force x _________
a)
a. distance
b)
b. acceleration
c)
c. velocity
d)
d. speed
45.
Force is a _____ or _______
a)
simple complex
b)
push pull
c)
up down
d)
in out
46.
What is the unit for mass?
a)
Kilogram (Kg)
b)
Newton (N)
c)
Joule (J)
d)
Watt (W)
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