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WorksheetsYear 7 Forces
Total questions: 104
Worksheet time: 3hrs 4mins
Name
Class
Date
1.
What is the net force?
a)
40 N left
b)
0 N Balalnced
c)
400 N right
d)
40 N right
2.
How will this object move?
a)
It won't move.
b)
It will move to the right.
c)
It will move to the left.
d)
It will move in both directions.
3.
What is the net force?
a)
30 N left
b)
25 N right
c)
5 N left
d)
55 N right
4.
Which could be an example of an unbalanced force?
a)
A plate sitting on a dining table
b)
A ball at the top of a hill that is not moving
c)
Earth orbiting the Sun
d)
A baseball that has been thrown to home plate.
5.
You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?
a)
60 N right
b)
10 N left
c)
60 n right
d)
50 N left
6.
The sum of all forces acting on an object and direction
a)
Contact Force
b)
Balanced Force
c)
Unbalanced Force
d)
Net Force
7.
8 N to the left , and 4 N to the right. Find the net force. Is this balanced
a)
12 N Right No
b)
4 N Left No
c)
12 N Right Yes
d)
4 N Left Yes
8.
Are forces balanced or unbalanced when a car is moving at a constant speed in a straight line?
a)
Balanced
b)
Unbalanced
9.
Are forces balanced or unbalanced when a marble rolls down a ramp?
a)
Balanced
b)
Unbalanced
10.
What are balanced forces?
a)
Forces in the same direction
b)
Forces of the same size
c)
forces of the same size in opposite directions
11.
How could you make an object increase its speed?
a)
use less force
b)
use more force
c)
use no force
12.
In a tug of war the left team pulls with a force of 200N. The right team pulls with a force of 150N.What is the resultant force?
a)
50N to the left.
b)
350N to the left.
c)
350N to the right.
d)
50N to the right.
13.
The force that opposes the motion of two surfaces sliding past each other is called ___________.
a)
acceleration
b)
inertia
c)
friction
d)
unbalanced
14.
What is the unit of force?
a)
Kilogram
b)
Meter
c)
Pascal
d)
Newton
15.
What is the unit of force?
a)
Kilogram
b)
Meter
c)
Pascal
d)
Newton
16.
What is it called when the force of gravity is acting on an object?
a)
Weight
b)
Sliding Friction
c)
Momentum
d)
Projectile Motion
17.
What is the attraction between two objects because of their mass?
a)
Inertia
b)
Gravity
c)
Gravitational Force
d)
Weight
18.
Imagine you travel to another planets. What will change as you walk around the surface of the planet- your mass or your weight?
a)
Mass
b)
Weight
c)
Both
d)
Neither
19.
This is a rocket.The rocket pushes the fuel down.What is the other force in this interaction pair?
a)
The fuel pulls the rocket up.
b)
The fuel pushes the rocket up.
c)
The rocket pulls the earth up.
d)
The earth pulls the rocket down.
20.
One object has twice as much mass as another object. The first object also has twice as much...
a)
velocity
b)
gravitational acceleration
c)
inertia
d)
all of these
21.
Suppose two carts, one twice as massive as the other, fly apart when the compressed spring that joins them is released. How fast does the heavier cart roll compared with the lighter cart?
a)
twice as fast
b)
the same
c)
half as fast
22.
In a normal environment, why does a bowling ball and feather hit the ground at different times when dropped from the same height?
a)
They don't; they hit the ground at the same time.
b)
One is more dense than the other.
c)
One is heavier than the other.
d)
Air resistance
23.
Inertia is the tendency of an object to resist a change in its ___________.
a)
temperature
b)
shape
c)
size
d)
motion
24.
If you dropped a bowling ball and a golf ball from the top of a building, which one would hit the ground first?
a)
bowling ball
b)
baseball
c)
neither
d)
both
25.
What force holds the planets in motion around the sun?
a)
Magnetic
b)
Electrical
c)
Gravitational
d)
Air Resistance
26.
What type of force is holding this balloon to the wall?
a)
Applied
b)
Gravitational
c)
Magnetic
d)
Electrical
27.
Which statement is true about balanced and unbalanced forces?
a)
Neither balanced or unbalanced forces cause motion
b)
Balanced forces can either have no motion or have an object moving at a constant speed
c)
Unbalanced forces do not change motion and balanced forces change motion
28.
Which contact force slows down an object's motion due to the rubbing of surfaces?
a)
Normal force
b)
Frictional force
c)
Magnetic force
d)
Applied force
29.
A science class was trying to figure out which ramp height would make a marble travel faster. What is the dependent variable?
a)
The marble's speed
b)
The height of the ramp
c)
The location of the ramp
d)
The size of the marble
30.
The paper clips are attracted to the magnet, what are they most likely made out of?
a)
Plastic
b)
Wood
c)
Metal
d)
Rubber
31.
A science class was trying to figure out which ramp height would make a marble travel faster. What is the independent variable?
a)
The marble's speed
b)
The height of the ramp
c)
The location of the ramp
d)
The size of the marble
32.
Whenever a car is moving at a constant speed, which choice is true
a)
All forces acting on the car are balanced
b)
The car has positive acceleration
c)
The car has negative acceleration
d)
All forces acting on the car are UNbalanced, because the car is in motion
33.
There is one person pushing a box to the RIGHT with 20 Newtons of force and one person pushing to the LEFT with 15 Newtons of force. What is true about the forces acting on the box?
a)
The forces are NOT balanced and the box will move to the left
b)
The forces are NOT balanced and the box will move to the right
c)
The forces ARE balanced and the box will not move
d)
The forces ARE balanced and the box will move to the left
34.
What does the strength of gravity between two objects depend upon?
a)
Mass & distance
b)
Mass & weight
c)
Gravity & inertia
d)
Inertia & mass
35.
What force brings the pencil down?
a)
Applied
b)
Magnetic
c)
Normal
d)
Gravitational
36.
What force ultimately slows the roller coaster to a stop?
a)
Applied
b)
Normal
c)
Friction
d)
Magnetic
37.
What force ultimately slows the roller coaster to a stop?
a)
Applied
b)
Normal
c)
Friction
d)
Magnetic
38.
What is defined as a push or pull?
a)
force
b)
motion
c)
vector
d)
speed
39.
This type of force resist motion between two surfaces that are pressed together
a)
contact
b)
gravity
c)
friction
40.
If the net force is equal to zero, the forces acting on the object are
a)
balanced
b)
unbalanced
41.
Balanced forces do not change the objects speed or
a)
direction
b)
distance
c)
time
d)
mass
42.
________ can be either a force of attraction or repulsion while ____________ is only a force of attraction.
a)
Gravity; Electromagnetism
b)
Electromagnetism; Gravity
c)
Gravity; Strong nuclear force
d)
Magnetism; Electricity
43.
An apple falling from a tree is an example of the force of ____________.
a)
Gravity
b)
Electromagnetism
c)
Strong Nuclear
d)
Weak Nuclear
44.
What is force?
a)
A push exerted on an object
b)
A push or pull exerted on an object
c)
A pull exerted on an object
d)
Nothing
45.
A force that acts where two objects touch
a)
Contact Force
b)
Non-contact Force
c)
Balanced Force
d)
Unbalanced Force
46.
Forces that produce a nonzero net force, which changes an objects motion.
a)
Force
b)
Momentum
c)
Unbalanced Force
d)
Speed
47.
The force that pulls objects toward each other
a)
Momentum
b)
Gravity
c)
Velocity
d)
Speed
48.
This is the amount of "stuff" in an object
a)
weight
b)
gravity
c)
mass
d)
volume
49.
If the mass of an object is 1000kg on Earth, what is it's mass on the moon?
a)
10kg
b)
100kg
c)
1000kg
d)
10,000kg
50.
You push on a tree with 20 N of force. If the tree doesn't move, the tree is pushing back on you with _____of force.
a)
20N
b)
40N
c)
10N
d)
70N
51.
Imagine you travel to another planets. What will change as you walk around the surface of the planet- your mass or your weight?
a)
Mass
b)
Weight
c)
Both
d)
Neither
52.
Who wins the tug of war with what net force?
a)
The person on the left with 20 N
b)
The person on the left with 80 N
c)
The people on the right with 20 N
d)
The people on the right with 100 N
53.
Which of the following best explains the behavior of the objects shown in the picture?
a)
inertia
b)
weight
c)
normal force
d)
air resistance
54.
Which statement is correct regarding the ball as it moves down the incline?
a)
It has a net force acting on it.
b)
All forces are balanced acting on it.
c)
The applied force is equal to friction.
d)
Its inertia is less than its mass.
55.
A flat sloping surface that connects lower and higher elevations. It makes raising objects easier.
a)
wedge
b)
screw
c)
lever
d)
inclined plane
56.
A simple machine that consists a rigid bar that pivot about a fixed point
a)
lever
b)
pulley
c)
wheel and axle
d)
fulcrum
57.
A seesaw is an example of a
a)
wedge
b)
lever
c)
inclined plane
d)
pulley
58.
A device that has two or more simple machines working together
a)
fulcrum
b)
pulley
c)
compound (complex) machine
d)
motor
59.
Stairs
a)
wedge
b)
pulley
c)
inclined plane
d)
wheel and axle
60.
Which is not a type of simple machine?
a)
spring
b)
screw
c)
pulley
d)
wedge
61.
What type of simple machine is found on the cap of a pickle jar?
a)
lever
b)
inclined plane
c)
pulley
d)
screw
62.
The fixed point on the lever is called
a)
load
b)
resistance
c)
bar
d)
fulcrum
63.
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
64.
What is an example of an inclined plane?
a)
crane
b)
slide
c)
bike
d)
see-saw
65.
What is an example of a pulley?
a)
slide
b)
flag pole
c)
ax
d)
chapstick
66.
Name this simple machine.
a)
Pulley
b)
Wheel and Axle
c)
Inclined Plane
d)
Lever
67.
Name this simple machine.
a)
Wheel and Axle
b)
Lever
c)
Pulley
d)
Wedge
68.
_________ is an example of a lever.
a)
Hammer
b)
Crowbar
c)
Wheelbarrow
d)
All of the above
69.
How can an incline plane reduce the amount of force required to lift an object?
a)
increase the length of the ramp
b)
increase the height of the ramp
c)
decrease the length of the ramp
70.
How could I reduce the effort force needed to lift the load?
a)
move the fulcrum away from the load
b)
move the fulcrum closer to the load
c)
place the fulcrum in the middle
71.
What is this an example of?
a)
wheel and axle
b)
lever
c)
inclined plane
d)
pulley
72.
A force is a _________ or ________ that acts on an object.
a)
hot, cold
b)
push, pull
c)
temperature, mass
73.
A simple machine consisting of a flat surface with one end higher than the other.
a)
inclined plane
b)
screw
c)
pulley
74.
Which surface causes the most friction: a tile floor, a grassy field, a paved road?
a)
grassy field
b)
paved road
c)
tile floor
75.
Gravity is...
a)
an object's speed
b)
an object's resistance to change in motion
c)
the force of attraction between any two objects
76.
A machine is a device that____________.
a)
changes either the magnitude or direction of force
b)
always makes lifting objects require more effort
c)
changes only magnitude of the force
d)
Changes only direction of the force
77.
Which of the following listed is a simple machine?
a)
A car
b)
An inclined plane
c)
A bicycle
d)
A chair
78.
What is the idea mechanical advantage if you push down a lever 10 m from the fulcrum and the load is 2 m from the fulcrum?
a)
5
b)
10
c)
2
d)
1
79.
A lever is designed to:
a)
reduce the amount of force required to do work
b)
increase the amount of effort required
c)
increase the amount of energy needed to work
80.
A simple machine that can split things apart or hold a door open.
a)
wedge
b)
screw
c)
lever
81.
What could I do to this machine to increase the efficiency?
a)
oil or grease it
b)
make it sharper
c)
make the ramp shorter
82.
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
83.
A wheelbarrow is an example of
a)
First Class Lever
b)
Second Class Lever
c)
Third Class Lever
d)
Fourth Class Lever
84.
In a first class lever, the _____ is in the middle.
a)
Effort
b)
Fulcrum
c)
Load
d)
Machine
85.
In a second class lever, the ______ is in the middle.
a)
Effort
b)
Fulcrum
c)
Load
d)
Machine
86.
In third class levers, the ______ is in the middle.
a)
Effort
b)
Fulcrum
c)
Load
87.
Which simple machine is really a modified version of the inclined plane?
a)
Pulley
b)
Lever
c)
Wedge
d)
I don't know
88.
Which of these is not part of the lever?
a)
Object
b)
Fulcrum
c)
Load
d)
Lever
89.
Which of the following does a simple machine NOT do?
a)
Increase the force applied
b)
Increase the distance the force is applied over
c)
Change the direction the force is applied
d)
Change the amount of work that needs to be done
90.
The force placed on the simple machine to move the load is called the ____.
a)
Effort
b)
Fulcrum
c)
Load
d)
Lever
91.
Simple machines allow us to do less work.
a)
TRUE
b)
FALSE
92.
A simple machine used to push two objects apart.
a)
Lever
b)
Inclined Plane
c)
Wedge
d)
Screw
93.
Which inclined plane makes work easiest?
a)
A very steep one
b)
A very long one
c)
A very wide one
d)
A very skinny one
94.
Is it easier to push a heavy object up a ramp or to lift a heavy object onto a truck?
a)
Push
b)
Lift
95.
Which of these options would reduce the effort needed to lift a load the most?
a)
A really short and very steep inclined plane
b)
A very long and very steep inclined plane
c)
A very long and not very steep inclined plane
d)
Not using an inclined plane and instead lifting the object straight up
96.
The place where a lever pivots is called the _______.
a)
Load
b)
Force/Effort
c)
Fulcrum
d)
Rigid Bar
97.
What is mechanical advantage?
a)
The advantage a machine has over a bicycle
b)
A measure of how much a simple machine reduces work
c)
A measure of when is the best time to use a simple machine
d)
the number of times a machine increases input force
98.
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=Input Distance/Output Distance)?
a)
0.5
b)
2
c)
3
d)
6
99.
The mechanical advantage of this inclined plane is...(MA=Resistance Force/Effort Force)
a)
2.4
b)
3.4
c)
4.4
100.
The work of pulling the box will be _________ if the man uses the ramp.
a)
complete
b)
more difficult
c)
easier
d)
painful
101.
The ramp helps the man do work by reducing the input ____________.
a)
distance
b)
force
c)
time
d)
power
102.
Jeff is a landscaping contractor and lifts a rock weighing 600 pounds by wedging a board under the rock. Jeff weighs 150 pounds and puts all of his weight on the lever. How much mechanical advantage did the lever provide to Jeff in lifting the rock?
a)
0
b)
2
c)
4
d)
8
103.
What is the mechanical advantage of the block and tackle used to lift the bale of cotton?
a)
1
b)
2
c)
3
d)
4
104.
This pulley
a)
has a mechanical advantage of 1 and does not make work easier.
b)
has mechanical advantage of 2 and reduces the force needed to lift an object.
c)
has a mechanical advantage of 2 and changes the direction of the applied force.
d)
has a mechanical advantage of 1 and changes the direction of the force needed to lift an object.
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