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Newton's Laws and Applications

Total questions: 73

Worksheet time: 1hrs 11mins

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.
For every action force there is...
a)
An equal and opposite reaction force
b)
An equal and different reaction force
c)
a different force
d)
two more forces
3.
What is the mass of an object that needs a force of 4500N to accelerate at a rate of 5 m/s2?
a)
22500N
b)
900kg
c)
9.8 m/s2
d)
 0 net force
4.

If an object accelerates at 5 m/s2, what will it's velocity be in 5 seconds?

a)

5 m/s

b)

25 m/s

c)

25 m/s faster than its original velocity

d)

20 m/s faster than its original velocity

5.
If a 10 kilogram object accelerates suddenly at 15 m/s2, how much force was applied to the object?
a)
150 Newtons
b)
15 Newtons
c)
150 kilograms
d)
100 kilograms
6.
If a force of 50 Newton's was applied to an object with a mass of 500 grams, what will the object's acceleration be?
a)
10 m/s2
b)
0.1 m/s2
c)
100 m/s2
d)
1 m/s2
7.
The overall force on an object when all the individual forces acting on it are added together
a)
Momentum
b)
Net force
c)
Velocity
d)
Unbalanced force
8.
If the mass of an object is 1000kg on Earth, what is it's mass on the moon? (g on the moon is 1/6 of g on earth)
a)
10kg
b)
100kg
c)
1000kg
d)
10,000kg
9.
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
10.
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 
11.
Inertia is the tendency of an object to resist a change in its ___________. 
a)
temperature
b)
shape
c)
size
d)
motion
12.
Which type of force is considered a SUPPORT force?
a)
applied
b)
normal
c)
friction
d)
magnetic
13.
What do we call the force of gravity is acting on an object?
a)
Weight
b)
Sliding Friction
c)
Momentum
d)
Projectile Motion
14.
Does mass differ from weight?
a)
Yes- they are very different!!
b)
No- they can be interchanged 
15.
A soccer ball accelerates more than a bowling ball when thrown with the same force.
a)
1st Law
b)
2nd Law
c)
3rd Law 
16.
A ball thrown at the ground bounces back up. 
a)
Law of Inertia (1st Law)
b)
Law of Mass and Acceleration (2nd law)
c)
Law of Action Reaction (3rd Law)
17.
Which has more Inertia? (needs more force to move) 
a)
Truck
b)
Ant
c)
A cat
d)
A skateboard
18.
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 
19.
If an object is stationary (not moving) the forces acting upon it _____________
a)
are unbalanced.
b)
are weak.
c)
are balanced.
d)
there are no forces acting.
20.
How many grams are in one kilogram?
a)
1000
b)
10000
c)
1
d)
100
21.
Your weight on the moon would be 
a)
the same as your weight on Earth 
b)
Six times more than you weight on Earth because of more gravity 
c)
1/6th of what it is on Earth because of less gravity 
22.

Suppose the force of friction on a sliding object is 25 N. The force needed to maintain a constant velocity is

a)

more than 25 N.

b)

25 N in the direction of the friction force

c)

less than 25 N.

d)

25 N to the direction opposite to the friction force

23.
A 10-kg brick and a 1-kg book are dropped in a vacuum. The force of gravity on the 10-kg brick is
a)
10 times as much as the force on the 1-kg book
b)
 zero.
c)
the same as the force on the 1-kg book.
d)
none of the above
24.

If an object is in equilibrium it must

a)

be at rest.

b)

be accelerating positively.

c)

be accelerating negatively.

d)

not be accelerating.

25.
If you pull an object across a rough surface with a 100N force at a constant speed, the force of friction is
a)
100N.
b)
greater than 100N.
c)
less than 100N.
26.
A 3 kg book rests on a table.  The normal force acting on the book is most nearly
a)
3kg.
b)
0.3N
c)
3N
d)
30N
27.
What is the unit of force?
a)
Kilogram
b)
Meter
c)
Pascal
d)
Newton
28.
This force holds us to earth’s surface.
a)
friction
b)
mass
c)
normal force
d)
weight
29.
At which location would your mass be the greatest?
a)
Earth
b)
Moon
c)
Jupiter
d)
Mass Stays the Same Everywhere
30.
On the Picture the balloon pushes the air right. What is the second force in this interaction pair?
a)
The air pulls the ball left
b)
Gravity pulls the balloon down
c)
The air pushes the balloon left.
d)
The air pulls the balloon right.
31.
This is a rocket.The rocket burns fuel expelling hot gases down.What is the other force in this interaction pair?
a)
The fuel pulls the rocket up.
b)
The hot gases pushes the rocket up.
c)
The rocket pulls the earth up.
d)
The earth pulls the rocket down.
32.
The direction in which an object accelerates is the same direction as the direction of 
a)
net force
b)
speed
c)
motion
d)
mass
33.
Acceleration is
a)
increasing speed
b)
decreasing speed
c)
changing direction
d)
all of the above
34.
If you are in an elevator standing on a scale, when will the scale reading equal your weight?
a)
Only when the elevator is at rest.
b)
Only when the elevator is accelerating upward
c)
Only when the elevator is accelerating downwoard.
d)
Only when the elevator is not accelerating.
35.
A 10 kg (100N) object sits on a scale in an elevator.  Find the scale reading if the elevator is moving upward at a constant 3m/s.
a)
30N
b)
100N
c)
130N
d)
70N
36.
A 10 kg (100N) object sits on a scale in an elevator.  Find the scale reading if the elevator is accelerating upward at 3m/s2.
a)
30N
b)
100N
c)
130N
d)
70N
37.
A 10 kg (100N) object sits on a scale in an elevator.  Find the scale reading if the elevator is accelerating downward at -3m/s2.
a)
30N
b)
100N
c)
130N
d)
70N
38.
A dog has a mass of 25kg.  The weight of the dog is about
a)
25N
b)
55N
c)
150N
d)
250N
39.
___________ is the amount of matter in an object.
a)
mass
b)
weight
c)
volume
d)
force
40.
The force that opposes the motion of two surfaces sliding past each other is called ___________.
a)
acceleration
b)
inertia
c)
friction
d)
unbalanced
41.
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.
42.
An object at rest will _______ if no outside forces are applied.
a)
Stay at rest
b)
Increase Velocity
c)
Decrease Mass
d)
Go to sleep
43.
A crumpled piece of paper hits the ground before a flat sheet of paper because
a)
the acceleration of gravity is greater on the  crumpled paper.
b)
there is more air resistance against the flat paper.
c)
the crumpled paper is more massive
d)
the crumpled paper is less massive.
44.
An ice skater at rest pushes against a sled at rest, causing both the skater and sled to move away from each other with different accelerations. This is an example best described by
a)
Newton’s first law of motion.
b)
Newton’s second law of motion.
c)
Newton’s third law of motion.
45.
If you kicked a ball in space it would keep going because there is no gravity, friction, or air friction going against it. It will only stop moving in that direction if something comes into contact with it. This is an example of...
a)
Newton's First Law
b)
Newton's Second Law
c)
Newton's Third Law 
46.
A net force of 20 N acts upon a 5 kg block. What is it's acceleration 
a)
4 m/s2
b)
100 m/s2
c)
10 m/s2
d)
5 m/s2
47.
If a 10 kilogram object accelerates suddenly at 15 m/s2, how much net force was applied to the object?
a)
150 Newtons
b)
15 Newtons
c)
150 kilograms
d)
100 kilograms
48.

Which of the following shows the direction of the drag force?

a)

A

b)

B

c)

C

d)

D

49.
Based on the FBD in the image, the object must be...
a)
 not moving
b)
moving with a constant velocity
c)
accelerating downward
d)
moving downward
50.

If a force of 26 N is exerted on two objects, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which object will have the greater acceleration? (F=ma)

a)

The one with a mass of 0.78 kg will have the greatest acceleration.

b)

The one with a mass of 0.52 kg will have the greatest acceleration.

c)

They will both accelerate at the same rate.

51.
Assuming the object in the image is sitting at rest on the table, which force would represent the Normal force?
a)
A
b)
B
c)
C
d)
D
52.
Assume the object in the image is at rest on a table, which vector represents weight?
a)
A
b)
B
c)
C
d)
D
53.

If Vector B is an applied force and the object is moving at a constant velocity, which vector would represent the frictional force?

a)

A

b)

B

c)

C

d)

D

54.

Use the graph of a 10 kg objects' motion to calculate the net force that must be applied! Hint, acceleration is the slope of the velocity vs. time graph.

a)

40 N in a positive direction

b)

20 N in a positive direction

c)

10 N in a positive direction

d)

THIS IS IMPOSSIBLE!!!

55.
If an object was accelerating at 10 m/s2, and a net force of 10 newtons was required to accelerate it, what was the object's mass?
a)
1 kilogram
b)
10 kilograms
c)
2 kilograms
d)
5 kilograms
56.
If you are on an elevator moving downward with a negative velocity, and SLOWING, decreasing speed, what would you feel and why?
a)
You would feel lighter because your acceleration is negative.
b)
You would feel heavier because the acceleration is negative
c)
You would feel lighter because your acceleration would be positive.
d)
You would feel heavier because your acceleration would be positive.
57.
Slowing down requires
a)
a negative acceleration
b)
an acceleration in the same direction as your velocity.
c)
an acceleration in the opposite direction from your velocity.
d)
a net force equal to zero.
58.
A car traveling at 15 m/s on a flat surface turns in a circle with a radius of 25 m.  What is the centripetal acceleration of the car?
a)
2.4 x 10-2 m/s2
b)
0.60 m/s2
c)
9.0 m/s2
d)
zero
59.
Which of the following terms means "center seeking"?
a)
centrifugal
b)
centrifuge
c)
centripetal
d)
centenarian
60.
Centripetal acceleration always points
a)
in the direction of the object's motion
b)
in the opposite direction of the object's motion
c)
towards the center of the circle
d)
towards the outside of the circle
61.
Bruno the bat flies at a speed of 0.5 m/s in circle of radius 1 m. What is his acceleration?
a)
0.25 ms-2
b)
0.5 ms-2
c)
1 ms-2
d)
2 ms-2
62.
If the gravitational force between the Earth and the Sun were suddenly switched off, the path of the Earth would be
a)
toward the sun.
b)
away from the sun.
c)
a straight line in the direction it was moving.
d)
a spiral out and away from the sun.
63.
A car travels with a constant speed in a circle.  The net force on the car is
a)
zero.
b)
directed forward.
c)
directed toward the center.
d)
directed outward, away from the center.
64.
A 0.5kg ball is whirled in a horizontal circle with radius 0.5m and a speed of 1m/s.  Calculate the Centripetal Force on the ball.
a)
0.5N
b)
1.0N
c)
2.0N
d)
2.5N
65.

Friction is a force that acts in a direction that is ___________ to the direction of movement.

a)

similar

b)

opposite

c)

parallel

66.

What type of friction happens before the objects begin to slide against each other?

a)

static

b)

sliding

c)

fluid

d)

rolling

67.

The force of friction depends on the weight of the objects pressing together.

a)

True

b)

False

68.

What are 2 factors that determine the force of friction between 2 objects?

a)

Force and roughness between surfaces

b)

hills and valleys and how smooth or rough the surface is

c)

Amount of force and amount of surface the comes in contact

d)

The force and the weight exerted on the surfaces

69.
What is the coefficient of static friction if it takes 44 N of force to move a box that weighs 86 N? 
a)
0.78
b)
0.51
c)
0.78 N
d)
0.58 N
70.

What type of friction occurs when the objects are sliding against each other?

a)

static

b)

rolling

c)

kinetic

71.

What are the units on the coefficient of friction (μ)?

a)

none

b)

Newtons

c)

meters

d)

kilograms

72.

A sled of mass 50 Kg is pulled along snow covered flat ground. The kinetic friction coefficient is 0.10. What force is needed to keep the sled moving at a constant velocity?

a)

19 N

b)

29 N

c)

39 N

d)

49 N

73.

A box takes 40 N to start moving when the coefficient of static friction is 0.54. What is the weight of the box?

a)

81 N

b)

18 N

c)

98 N

d)

74 N

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