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WorksheetsReview of Forces and Free Body Diagrams
Total questions: 35
Worksheet time: 33mins
Name
Class
Date
1.
A block is sitting at rest on a table. There are no applied forces. How many forces should be shown on the block in the free body diagram?
a)
0
b)
1
c)
2
d)
3
e)
4
2.
An object is sitting on a horizontal supporting surface. If that object is at rest, what relationship must be true below?
a)
- Force of Gravity = Normal Force
b)
- Force of Gravity < Normal Force
c)
- Force of Gravity > Normal Force
3.
A block is sitting at rest on an inclined ramp. There are no applied forces. How many forces should be shown on the block in the free body diagram?
a)
0
b)
1
c)
2
d)
3
e)
4
4.
Match description with free-body diagram.
a)
A book is at rest on a tabletop.
b)
A gymnast holding onto a bar, is suspended motionless in mid-air. The bar is supported by two ropes that attach to the ceiling. Diagram the forces acting on the combination of gymnast and bar.
c)
An egg is free-falling from a nest in a tree. Neglect air resistance.
d)
A flying squirrel is gliding (no wing flaps) from a tree to the ground at constant velocity. Consider air resistance.
5.
Match description with free-body diagram.
a)
A book is at rest on a tabletop.
b)
A gymnast holding onto a bar, is suspended motionless in mid-air. The bar is supported by two ropes that attach to the ceiling. Diagram the forces acting on the combination of gymnast and bar.
c)
An egg is free-falling from a nest in a tree. Neglect air resistance.
d)
A flying squirrel is gliding (no wing flaps) from a tree to the ground at constant velocity. Consider air resistance.
6.
Match description with free-body diagram.
a)
A rightward force is applied to a book in order to move it across a desk with a rightward acceleration. Consider frictional forces. Neglect air resistance.
b)
A rightward force is applied to a book in order to move it across a desk at constant velocity. Consider frictional forces. Neglect air resistance.
c)
A college student rests a backpack upon his shoulder. The pack is suspended motionless by one strap from one shoulder.
d)
A skydiver is descending with a constant velocity. Consider air resistance.
7.
What is the direction of the force of gravity acting on the box?
a)
down the ramp to the right
b)
straight up
c)
straight down
d)
up the ramp to the left
8.
A(n) __________ is a push or pull.
a)
newton
b)
acceleration
c)
force
d)
momentum
9.
What is Newton's First Law known as? The Law of
a)
Friction
b)
Mass
c)
Inertia
d)
Gravity
10.
Name the missing force....
a)
weight force
b)
normal force
c)
frictional force
d)
tension force
11.
Name the missing force...
a)
applied force
b)
weight force
c)
lift
d)
normal force
12.
Name the missing force...
a)
frictional force
b)
weight force
c)
thrust
d)
buoyant force
13.
What is the net force?
a)
5000 N right
b)
4000 N right
c)
40 N left
d)
4000 N left
14.
What is the net force in this picture?
a)
50 Newtons to the right
b)
950 Newtons to the right
c)
950 Newtons to the left
d)
50 Newtons to the left
15.
What makes a rolling ball stop moving?
a)
gravity
b)
friction
c)
a balanced force
16.
If there are two forces going in the same direction how would you find the net force?
a)
Subtract
b)
Add
c)
Neither
d)
Multiply
17.
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
18.
When a heavy football player and a light one run into each other, who exerts more force?
a)
The heavy one
b)
The light one
c)
They are equal
d)
there is no such thing as force
19.
What is Newton's First Law
a)
F=ma
b)
Every action has an equal and opposite reaction
c)
An object at rest stays at rest, an object in motion stays in motion.
d)
Friction
20.
What pulls a ball back to earth?
a)
Gas
b)
Gravity
c)
Friction
d)
Molecules
21.
Will it take more force to push an empty shopping cart or a shopping cart that is full?
a)
The empty shopping cart
b)
The full shopping cart
c)
They will take the same amount of force
22.
The stronger the force, the ________ the acceletation
a)
Stronger
b)
Weaker
c)
Both
23.
When a cannon fires a cannonball we observe Newton's third law. Which force is the reaction force?
a)
The cannon moving forward
b)
The cannonball moving forward
c)
The cannon moving backward
d)
The cannonball moving backward
24.
What force stops your foot slipping on the ground when you walk?
a)
Gravity
b)
Kinetic energy
c)
Friction
d)
Upthrust
25.
Newton's _____ Law of Motion means that for every force there is a reaction force that is equal in size, but opposite in direction.
a)
First
b)
Second
c)
Third
d)
Fourth
26.
When force is 20 N, mass is 5 kg, what is acceleration?
F = ma
F = ma
a)
25 m/s/s
b)
5 m/s/s
c)
100 m/s/s
d)
4 m/s/s
27.
F=MA
An object of mass 10 kg is accelerated upward at 2 m/s2. What force is required?
An object of mass 10 kg is accelerated upward at 2 m/s2. What force is required?
a)
20 N
b)
2 N
c)
5 N
d)
0 N
28.
What is the net force?
a)
17 N Right
b)
3 N Right
c)
3 N Left
d)
17 N Left
29.
What is occurring if mgsin(θ) is greater than μkmgcos(θ)?
a)
The block is sitting still
b)
The block is speeding up as it slides down the ramp.
c)
The block is sliding down the ramp at a constant speed.
d)
The block is slowing down as it slides down the ramp.
30.
To find the weight
a)
mg
b)
sin(θ)mg
c)
cos(θ)mg
d)
tan(θ)mg
31.
To find the normal force
a)
mg
b)
sin(θ)mg
c)
cos(θ)mg
d)
tan(θ)mg
32.
If there is not friction, then the acceleration would be equal to
a)
mg
b)
sin(θ)mg
c)
g
d)
sin(θ)g
33.
If there is no friction, a =
a)
9.8 m/s/s
b)
3.35 m/s/s
c)
8.37 m/s/s
d)
9.21 m/s/s
34.
The force that opposes the force of gravity is called...
a)
force of acceleration
b)
normal force
c)
dissipated force
d)
irregular force
35.
A hockey puck slides on ice at a constant velocity. What is the net force acting on the puck?
a)
Zero
b)
Equal to its weight
c)
Less than its weight but greater than zero
d)
Depends on the speed of the puck
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