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1d dynamics test

Total questions: 111

Worksheet time: 4hrs 43mins

Name
Class
Date
1.
What is the net force?
a)
17 N Right
b)
3 N Right
c)
3 N Left
d)
17 N Left
2.
What is SI units for force ?
a)
Grams g()
b)
Hectogram (Hg)
c)
Newtons (N)
d)
Meters (m)
3.
Calculate the Net Force. 
a)
60N, Left 
b)
40N, Right 
c)
0N
d)
60N, Right
4.
Which of the following laws state that for every action there is an equal and opposite reaction?
a)
The law of conservation of momentum
b)
Newton's 1st Law of Motion
c)
Newton's 2nd Law of Motion
d)
Newton's 3rd Law of Motion
5.
What happens to the inertia of an object if the mass increases?
a)
It decreases.
b)
It remains constant.
c)
It increases then decreases
d)
It increases
6.
If you exert a net force of 8 N on a 2-kg object, what will its acceleration be?
a)
2 m/s2
b)
4 m/s2
c)
16 m/s2
d)
10 m/s2
7.
An object at rest will stay at rest, and an object in motion will stay in motion at constant velocity unless acted upon by an unbalanced force
a)
Newton's First Law
b)
Newton's Second Law
c)
Newton's Third Law
8.
If you weigh 678 N on Earth, what is your mass?
a)
69.1 kg
b)
6650 kg
c)
0.0144 kg
d)
678 kg
9.
If you weigh 574 N on Earth, what would you weigh on the Moon (g = 1.60m/s2)?
a)
93.6 N
b)
58.5 N
c)
359 N
d)
918 N
10.
If you weigh 610 N on Earth and 920 N on planet X, what is the acceleration due to gravity on planet X.
a)
14.8 m/s2
b)
6.57 m/s2
c)
13.9 m/s2
d)
15.2 m/s2
11.
If you are standing on a scale in an elevator and the elevator is accelerating upward, you’re apparent weight would_______ relative to your actual weight.
a)
increase
b)
decrease
c)
be unchanged 
12.
If you are standing on a scale in an elevator and the elevator is accelerating downward, you’re apparent weight would_______ relative to your actual weight.
a)
increase
b)
decrease
c)
be unchanged 
13.
If you are standing on a scale in an elevator and the elevator is traveling at a constant speed, you’re apparent weight would_______ relative to your actual weight.
a)
increase
b)
decrease
c)
 be unchanged 
14.

A leaf falls from a tree and lands on the sidewalk. Identify an action-reaction pair in this situation.

a)

The tree exerts a force on the leaf; the sidewalk exerts a force on the leaf.

b)

The leaf exerts a force on the sidewalk; the sidewalk exerts a force on the leaf.

c)

The leaf exerts a force on the tree; the sidewalk exerts a force on the leaf.

d)

The leaf exerts a force on the sidewalk; the tree exerts a force on the leaf.

15.

A newton is equivalent to which of the following quantities?

a)

kg

b)

kg·m/s

c)

kg·m/s2

d)

kg·(m/s)2

16.
The normal force on an object always acts _______.
a)
perpendicular to the surface
b)
parallel to the surface
c)
opposite of the force of gravity
d)
parallel to the center of mass
17.

An elevator with a mass of 2 220 kg is supported by a steel cable. What is the tension in the cable when the elevator is being accelerated downward at a rate of 3.60 m/s2? (g = 9.80 m/s2)

a)

13 800 N

b)

29 800 N

c)

14 700 N

d)

21 800 N

18.
At a wedding reception, you notice a small boy who looks like his mass is about 29 kg running part way across the dance floor, then sliding on his knees until he stops. If the kinetic coefficient of friction between the boy’s pants and the floor is 0.25, what is the frictional force acting on him as he slides?
a)
116 N
b)
71 N
c)
280 N
d)
64 N
19.
It requires 840 N of force to slide a couch across a floor at a constant velocity.  If the couch is 220 kg, what is the coefficient of kinetic friction between the couch and the floor?
a)
3.82
b)
0.26
c)
0.39
d)
0.84
20.
A 225-kg crate is pushed horizontally with a force of 710 N. If the coefficient of friction is 0.30, calculate the acceleration of the crate.
a)
0.21 m/s2
b)
0.30 m/s2
c)
2.36 m/s2
d)
0.42 m/s2
21.
The diagram represents an object being held at rest on a frictionless incline. The net force is equal to
a)
zero
b)
normal force
c)
weight
d)
friction
22.

A block is pulled up a ramp at a constant velocity with a force parallel to the ramp, making angle θ with the horizontal. As theta is increased

a)

the blocks mass will decrease

b)

the blocks mass will increase

c)

the blocks component of weight parallel to the ramp will increase

d)

the blocks component of the weight parallel to the ramp will decrease

23.

A block is pulled up a ramp at a constant velocity with a force parallel to the ramp, making angle θ with the horizontal. As theta is increased

a)

the blocks mass will decrease

b)

the blocks mass will increase

c)

the friction force on the block will increase

d)

the friction force on the block will decrease

24.
A cart rolls down an inclined plane with constant speed as shown in the diagram below. Which arrow represents the direction of frictional force?
a)
A
b)
B
c)
C
d)
D
25.

A cart is pulled up an inclined plane with constant speed as shown in the diagram below. Which arrow represents the direction of frictional force?

a)

A

b)

B

c)

C

d)

D

26.
The Earth pulls downward on a pingpong ball with a force  of 1N. If this is the "action" force, what is the "reaction" force?
a)
The ground exerts a force of 1N on the ping pong ball
b)
The ping pong ball exerts a force of 1 N on the Earth
c)
The ping pong ball pushes down on the earth with a force of 1N
d)
The is no reaction force when a gravitational force is involved
27.

Given the FBD, which of the following must be true?

a)

The frictional force must be accelerating the system to the left.

b)

The box must be accelerating to the right.

c)

The box must be moving to the right.

d)

The FBD is incorrectly drawn. This situation isn't possible

28.

Three forces of equal magnitude act on the box shown. One force is upward, one downward, and one rightward. Which of the following statements must be true based on this information? Select two answers.

a)

The box must have a rightward component of velocity.

b)

The box has no vertical component of velocity.

c)

The acceleration of the box is directed to the right.

d)

The velocity of the box is changing with time.

29.

A net force of 36 N acts on a mass of 9 kg. The resulting acceleration is _____.

a)

6 m/s2

b)

9 m/s2

c)

4 m/s2

d)

0 m/s2

30.

A mass of 15 kg is acted on by two forces, one of which is 15 N due east while the second one is 10 N due north. The acceleration of the mass is

a)

1.67 m/s2, 56.3o north of east.

b)

1.2 m/s2, 33.7 o north of east.

c)

1.67 m/s2, 56.3o north of east.

d)

1.67 m/s2, 33.7 o north of east.

31.

Is it possible for the normal force to be equal to the gravitational force?

a)

Yes. If the surface is horizontal and Fg is perpendicular to the surface.

b)

Yes. If the surface is vertical and Fg is parallel to the surface.

c)

No. FN will always be less than Fg

d)

No. Fg will be less than FN.

32.

A box with mass of 10 kg is being pushed by 20 N Force. Calculate the acceleration! (no friction)

a)

1 m/s2

b)

2 m/s2

c)

3 m/s2

d)

4 m/s2

33.

A 1000 kg car is being push by two men. Each men is pushing to the left with a force of Force of 100 N. Calculate the acceleration of the car!

a)

0.1 m/s2

b)

0.2 m/s2

c)

0.3 m/s2

d)

0.4 m/s2

34.

A box is being pushed 20 N to the right by Alpha. At the same time Beta pulls the box to the right with Force of 10 N. At the same time Gamma pulls the box to the left with a force of 30 N. What is the resultant force of that box?

a)

60 N to the right

b)

30 N to the left

c)

30 N to the right

d)

0 N

35.

A force of 8 Newton’s is applied to a crate so that it moves at a constant velocity of 1.5 m/s. What is the net force?

a)

1.5 N

b)

8 N

c)

12N

d)

0 N

36.

A force of 8 Newton’s is applied to a crate so that it moves at a constant velocity of 1.5 m/s. What is the magnitude of the frictional force?

a)

1.5 N

b)

8 N

c)

12N

d)

0 N

37.

Is this object in equilibrium?

a)

Yes and it's moving right

b)

Yes and its at rest

c)

No, it's accelerating right

d)

No, it's at rest

38.

Here are 3 FBD diagrams for an elevator. Consider them to be A, B, C. Which one shows an elevator accelerating upward?

a)

A

b)

B

c)

C

d)

none of these

39.

Here are 3 FBD diagrams for an elevator. Consider them to be A, B, C. Which one shows an elevator at rest?

a)

A

b)

B

c)

C

d)

none of these

40.

Here are 3 FBD diagrams for an elevator. Consider them to be A, B, C. Which one shows an elevator moving upward but slowing down?

a)

A

b)

B

c)

C

d)

none of these

41.

Here are 3 FBD diagrams for an elevator. Consider them to be A, B, C. Which one shows an elevator moving at a constant rate of 2.5 m/s?

a)

A

b)

B

c)

C

d)

none of these

42.

Is it possible for the object in the diagram to be moving to the right and have this FBD?

a)

Yes. It's possible that the x forces were just left off the diagram.

b)

Yes. It could be moving at a constant velocity.

c)

No. The FBD shows that the system is in equilibrium.

d)

No. An FBD shows all F.

43.

A force is required keep an object in motion in the absence of friction.

a)

True. Every motion requires a force to keep it in motion.

b)

True. Every force causes motion.

c)

False. Motion can occur when there is no net force.

d)

False. Only applied forces cause motion.

44.

A book is lying at rest on a table. The book will remain there at rest because:

a)

there is a net force but the book has too much inertia

b)

there are no forces acting on it at all

c)

it does move, but too slowly to be seen

d)

there is no net force on the book

45.
Consider a cart on a horizontal frictionless table. Once the cart has been given a push and released, what will happen to the cart?
a)
slowly come to a stop
b)
continue with constant acceleration
c)
continue with decreasing acceleration
d)
continue with constant velocity
46.
What can you say about the force of gravity Fg acting on a stone and a feather?
a)
Fg is greater on the feather
b)
Fg is greater on the stone
c)
Fg is zero on both due to vacuum
d)
Fg is equal on both always
47.

What can you say about the acceleration of gravity acting on the stone and the feather?

a)

g is greater on the feather

b)

g is greater on the stone

c)

g is zero on both due to vacuum

d)

g is equal on both always

48.
An astronaut on Earth kicks a bowling ball and hurts his foot. A year later, the same astronaut kicks a bowling ball on the Moon with the same force. His foot hurts...
a)
more
b)
less
c)
the same
49.
When you climb up a rope, the first thing you do is pull down on the rope. How do you manage to go up the rope by doing that?
a)
this slows your initial velocity which is already upward
b)
you don�t go up, you�re too heavy
c)
you�re not really pulling down�it just seems that way
d)
the rope actually pulls you up
50.
A small car collides with a large truck. Which experiences the greater impact force?
a)
the car
b)
the truch
c)
both the same
d)
depends on the velocity of each
51.
What is the unit to MEASURE force?
a)
Kilogram
b)
Meter
c)
Pascal
d)
Newton
52.
A ____________ is a push or a pull on an object.
a)
friction
b)
force
c)
magnet
d)
gravity
53.

When the net force equals 0 it means the forces are

a)

balanced

b)

unbalanced

54.

The formula for Weight.

a)

F = ma

b)

F = mv

c)

F = mg

d)

F = mt

55.

A resistance to a change in motion.

a)

Force

b)

Friction

c)

Inertia

d)

acceleration

56.

A magician pulling a table cloth out from under dishes demonstrates which law of motion?

a)

1st Law

b)

2nd Law

c)

3rd Law

d)

4th Law

57.

A car comes to a screeching halt and the passengers move forwards being restrained by their seat-belts is a good example of this.

a)

force

b)

inertia

c)

velocity

d)

acceleration

58.

The type of friction you overcome to "start" and object to move.

a)

inertia

b)

static

c)

kinetic

d)

energy

59.

A rocket takes off, the gasses go in one direction and the rocket in the opposite direction. Which law does this demonstrate?

a)

1st Law

b)

2nd Law

c)

3rd Law

d)

4th Law

60.

A force that opposes motion.

a)

inertia

b)

friction

c)

gravity

d)

energy

61.

This factor determines how much inertia an object has.

a)

velocity

b)

acceleration

c)

charge

d)

mass

62.

You push against the wall and the wall pushes back on you. Which law does this demonstrate?

a)

1st Law

b)

2nd Law

c)

3rd Law

d)

4th Law

63.

A car has a mass of 2,000 kg, how much force is acting on it if it is being accelerated at 4 m/s2? (assume no friction)

a)

2,000 Kg

b)

2,000 N

c)

8,000 N

d)

500 N

64.

What is a Newton equal to?

a)

kg m/s

b)

kg m/s2

c)

C m/s

d)

Kg x Kg x m x m x s x s

65.
Wind blowing at 20 mph.Vector or scalar?
a)
Scalar
b)
Vector
66.
30 m/sec, East. Scalar or Vector
a)
Scalar
b)
Vector
c)
Neither
67.
"For every action, there is an equal and opposite reaction."
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
Newton's 4th Law
68.
Force = Mass x Acceleration
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
Newton's 4th Law
69.
"An object in motion (or at rest) will to stay in motion (or at rest) until an outside force acts upon it."
a)
Newton's 1st Law
b)
Newton's 2nd Law
c)
Newton's 3rd Law
d)
Newton's 4th Law
70.
If a 2kg bird is pushed by the wind with a force of 2N, how fast does the bird accelerate?
a)
1 m
b)
2 m/s2
c)
4m/s2
d)
1 m/s2
71.
Why is it harder for the boy in Image B to get down the hill?
a)
Motion
b)
Friction
c)
Work
d)
Displacement
72.
Which force produces a change in motion?
a)
unbalanced force
b)
balanced force
c)
gravitational force
d)
frictional force
73.
What happens when two forces act in the same direction?
a)
They cancel each other out.
b)
The stronger one prevails.
c)
Their strengths are added.
d)
Their sum divided by the two is the total force.
74.
What is the formula for force?
a)
F=M/A
b)
F=A/M
c)
F=M*A
d)
F=M*F
75.
When you tell the direction and speed of an object, you give its
a)
motion
b)
velocity
c)
acceleration
d)
mass
76.
What is the net force
a)
10 N
b)
0 N
c)
25 N
d)
1 N
77.
Forces that have a net force that is not zero.
a)
Balanced force
b)
Unbalanced force
78.
What is the net force?
a)
400 N Up
b)
400 N Down
c)
- 400 N Down
d)
800 N Down
79.
Which way is the box moving?
a)
to the right
b)
to the left
c)
going up
d)
going down
80.
Which way is the object moving?
a)
left
b)
right
c)
down
d)
up
81.
Name the missing force...
a)
weight force
b)
normal force
c)
applied force
d)
frictional force
82.
Name the missing force...
a)
frictional force
b)
weight force
c)
thrust
d)
buoyant force
83.
Name the missing force...
a)
tension force
b)
gravitational force
c)
normal force
d)
applied force
84.

A leftward force is applied to a crate to push it across the floor at a constant speed. Which is the correct force diagram?

a)
b)
c)
d)
85.

A rightward force is applied to a dresser to accelerate it to the right across the bedroom floor.

a)
b)
c)
d)
86.

A hockey puck glides to the right across the ice at a constant speed.

a)
b)
c)
d)
87.
 Which of the following is a force?
a)
Inertia 
b)
Friction
c)
Velocity
d)
Acceleration 
88.
What is the net force?
a)
20 N 
b)
0 N 
c)
400 N 
d)
40 N 
89.
What is the net force?
a)
30 N 
b)
25 N 
c)
5 N 
d)
55 N 
90.
Calculate the Net Force. 
a)
60N, Left 
b)
40N, Right 
c)
0N
d)
60N, Right
91.
Calculate the Net Force. 
a)
40N, Left
b)
40N, Right
c)
0N, Balanced
d)
75N, Right
92.
Name the missing force...
a)
applied force
b)
weight force
c)
lift
d)
normal force
93.
Name the missing force....
a)
weight force
b)
normal force
c)
frictional force
d)
tension force
94.
Name the missing force...
a)
tension force
b)
frictional force
c)
normal force
d)
spring force
95.
A box is moving to the left up a ramp. Which way is the force of friction pointing?
a)
down the ramp to the right
b)
up the ramp to the left
c)
there is no friction
d)
straight up
96.
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
97.
Acceleration of an object happens when things ________
a)
slow down
b)
go faster
c)
change direction (turn)
d)
All of the above
98.
How much force is needed to accelerate a 3kg skateboard at 5m/s2. 
a)
8N
b)
1.6N
c)
0.6N
d)
15N
99.
How much force is needed to accelerate a 25kg bowling ball at 2m/s2. 
a)
50N
b)
5N
c)
12.5N
d)
100N
100.
What force holds the planets in motion around the sun?
a)
Magnetic
b)
Electrical
c)
Gravitational
d)
Air Resistance
101.
What force brings the pencil down?
a)
Applied
b)
Magnetic
c)
Normal
d)
Gravitational
102.
Which has more gravitational force acting upon it?
a)
a bus
b)
a train
c)
a car
d)
a person
103.
What force ultimately slows the roller coaster to a stop?
a)
Applied
b)
Normal
c)
Friction
d)
Magnetic
104.
What is the magnitude (size) and direction of the net force?
a)
21 N to the Left
b)
3 N to the Left
c)
21 N to the Right
d)
3 N to the Right
105.
The SI Unit of velocity is
a)
Pascal
b)
Meter/second
c)
Newton
d)
kg
106.
Which ball will hit the ground first?
a)
basketball
b)
tennis ball
c)
both will hit at the same time
d)
there is no way to tell
107.
Objects at rest will remain at rest, objects in motion will remain in motion until an outside force acts upon it. What is this physics vocabulary word? 
a)
momentum 
b)
velocity
c)
inertia 
d)
speed
108.
What is the formula for calculating speed?
a)
Mass x Acceleration
b)
Speed x Time
c)
Distance/ Time
d)
Distance/  Speed
109.

What is the contact force perpendicular to the surface? (Hint: support)

a)

Normal

b)

Friction

c)

Gravity

d)

Tension

110.

What is the force that comes from something hanging or being pulled by a rope?

a)

Normal

b)

Gravity

c)

Tension

d)

Friction

111.
A block has been pushed and is now sliding across a frictionless table.  What is it's motion?
a)
constant velocity
b)
slowing down
c)
speeding up
d)
constant velocity and then slowing down

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