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Laws of motion

Total questions: 104

Worksheet time: 2hrs 40mins

Name
Class
Date
1.

Newton's First Law States........

a)

Objects at rest tend to stay at rest unless acted on by an outside force.

b)

Objects accelerate often and it is difficult to know when or how they will accelerate.

c)

Objects in motion tend to stay in motion unless acted on by an outside force.

d)

Both A & C

2.

What is inertia?

a)

An object that is accelerating

b)

Gravitational force

c)

An objects tendency to stay at rest or in motion

d)

An unbalanced force

3.

Inertia depends on __________.

a)

Weight

b)

none of these

c)

Mass

d)

Acceleration

4.

What formula is used to calculate force?

a)

Acceleration = Force x Mass

b)

Force = Mass x Acceleration

c)

Work = Force x Distance

d)

Mass = Force + Acceleration

5.

A force of 40 N acts upon a 2 kg block. Calculate the acceleration of the object.

a)

20 m/s2

b)

20 m/s

c)

80 m/s2

d)

80 m/s

6.

Newton's third law states.......

a)

For each action there is a larger reaction associated with it.

b)

None of these choices

c)

For each action there is an equal and opposite reaction.

d)

For each action there is a smaller reaction associated with it.

7.

The tendency of an object to just keep doing what it is doing.

a)

Laziness

b)

F=MA

c)

No Clue

d)

Inertia

8.
Which of the following best describes the velocity of an object?
a)
30 m/s
b)
30 m East
c)
30 m/s East
d)
30 m/s2
9.
Which law best explains why the coin sitting on top of the ring falls directly into the jar below because it wants to remain at rest?
a)
Newton's Law of Inertia
b)
Newton's Law of F=ma
c)

Newton's 3rd Law

d)
Newton's Law of Science
10.
Which one of Newton’s Laws of Motion best explains why the dishes do not move when the table cloth is removed?
a)
Newton's Law of Inertia
b)
Newton's Law of F=ma
c)

Newton's 3rd Law

d)
Newton's Law of Biology
11.
A force of 560 N is needed to produce an acceleration of 20 m/s2. What is the mass of the accelerated body?
a)
28 kg
b)
11200 kg
c)
0.04 kg
d)
580 kg
12.
The force that draws all objects towards Earth.
a)
friction
b)
gravity
c)
mass
d)
acceleration
13.
A rubbing together force that slows things down and stops them.  It works against motion.
a)
acceleration
b)
mass
c)
gravity
d)
friction
14.
Newton's first law that says an object at rest will remain at rest unless acted upon by an unbalanced force is also called the law of 
a)
acceleration
b)
inertia
c)
action and reaction
d)
may the force be with you
15.
What is the standard unit force is measured in?
a)
Newtons
b)
pounds
c)
grams
d)
meters
16.
The momentum of an object depends upon the object's ___________&_____________.  
a)
size and shape
b)
mass and speed
c)
mass and veloctiy
d)
mass and energy
17.
The equation to calculate momentum is
a)
p=mv
b)
p=1/2mv2
c)
p=mgh
d)
p=mg
18.
What is Newton's Third Law?
a)
Object in motion stays in motion and an object at rest stays at rest unless acted on by a outside force
b)
Force = mass x acceleration
c)
For every action there is an equal and opposite reaction
19.
A runner has a momentum of 720 kg m/s and is traveling at a velocity of 5 m/s. What is his mass?
a)
14.4 kg
b)
1400 kg
c)
144 kg
d)
360 kg
20.
When the speed of an object is doubled, its momentum
a)
remains unchanged in accord with the conservation of momentum.
b)
doubles
c)
quadruples
d)
decreases
21.
A 20 kg bike accelerates at 10 m/s2.  what was the force?
a)
25 Newtons
b)
20 Newtons
c)
200 Newtons
d)
10 Newtons
22.
What is Newton's First Law known as? The Law of
a)
Friction
b)
Mass
c)
Inertia
d)
Gravity
23.
If you double the mass of an object with the same force apply on it, the acceleration will
a)
double
b)
cut in half
c)
the same
d)
zero
24.
A book weighs 4 N. When held at rest in your hands, the net force on the book is
 
a)
0 N.
b)
 0.4 N.
c)
 4 N.
d)
 39 N.
25.
An object in motion will stay in what kind of motion as long as the net forces acting on it are zero?
a)
slowing motion in a straight line
b)
accelerating motion in a straight line
c)
constant motion in a straight line
d)
constant motion in an unpredictable direction
26.
Why would one ball travel a greater distance than the other when pushed with the same amount of force?
a)
Different sizes
b)
Different weights
c)
Different masses
d)
Different forces
27.
When you hold an apple above your head, how many force pairs act on the apple?
a)
1
b)
2
c)
3
d)
4
28.
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.
29.

The ratio of force and acceleration measures :

a)

Velocity

b)

impulse

c)

momentum

d)

none of the above

30.

A body moving in a circular path with constant speed has :

a)

constant retardation

b)

variable acceleration

c)

radially outward acceleration

d)

constant acceleration

31.
One object has twice as much mass as another object. The first object also has also twice as much...
a)
velocity
b)
gravitational acceleration
c)
inertia
d)
all of these
32.
What is the force of gravity on a 5 kg object? 
a)
5 kg
b)
5 N
c)
49 N
d)
0.51 N
33.

Rate of change of momentum is equal to

a)

acceleration

b)

work done

c)

force

d)

impulse

34.

When an object undergoes acceleration

a)

Its speed always increases

b)

Its velocity always increases

c)

It always falls towards the earth

d)

A force always acts on it.

35.

A rocket or jet engine works on the principle of

a)

Conservation of energy

b)

Conservation of mass

c)

Conservation of momentum

d)

Newton’s second law of motion.

36.

Newtons first law of motion is also known as..........

a)

Law of force

b)

Law of friction

c)

Law of inertia

d)

Law of momentum

37.

The S.I. unit of force is

a)

N/S

b)

N.S

c)

N.M

d)

Newton

38.

When a 12 N force acts on 3 kg mass for a second, the change in velocity is (in m/s)

a)

36

b)

4

c)

2

d)

8

39.

Among the equal-sized stone and a football, the inertia will be higher of:

a)

football

b)

stone

c)

both

d)

none of them

40.

if a boy pushes a wall with a force of 10N towards east then the force exerted by the wall on the boy is .......

a)

10N towards EAST

b)

10N towards WEST

c)

20N towards east

d)

10N towards NORTH

41.

The linear momentum of an object is 250 g cm/s. If the velocity of the object is 5 m/s, then the mass of the object is

a)

0.5g

b)

0.5kg

c)

5kg

d)

5g

42.

Force F=...............

a)

ma

b)

m(v-u/t)

c)

mv/t

d)

Both A and B

43.

Effect of action of no net force acting on an object

a)

First law of motion

b)

Second law of motion

c)

Third law of motion

d)

None of these

44.

Direction of momentum is direction of ......

a)

speed

b)

velocity

c)

accelaration

d)

force

45.

Newton used the word 'mass in motion' to represent

a)

Linear momentum

b)

Inertia of motion

c)

Velocity

d)

inertia at rest

46.
When you tell the direction and speed of an object, you give its
a)
motion
b)
velocity
c)
acceleration
d)
mass
47.
What is the unit to MEASURE force?
a)
Kilogram
b)
Meter
c)
Pascal
d)
Newton
48.
"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
49.

A fielder pulls his hands backwards after catching the cricket ball. This enables the fielder to:

a)

exert larger force on the ball

b)

reduce the force exerted by the ball

c)

increase the rate of change of momentum

d)

keep the ball in hands firmly

50.

The inertia of an object tends to cause an object

a)

to increase its speed

b)

to decrease its speed

c)

to resist a change in its state of motion

d)

to decelerate due to friction

51.

The rockets work on the principle of conservation of (a)   .

52.

Newton's first law of motion is also called Galileo's law of (a)   .

53.

When we talk of a force acting on a body, it usually means:

a)

electrical force

b)

balanced force

c)

unbalanced force

d)

nuclear force

54.
What is a PUSH or PULL of an object?
a)
Motion
b)
Force
c)
Friction
d)
Gravity
55.

Forces in a Newton's third law pair have equal magnitudes but act in opposite (a)   .

56.
The momentum of an object depends upon the object's ___________&_____________.  
a)
size and shape
b)
mass and speed
c)
mass and veloctiy
d)
mass and energy
57.
Which object listed below has the greatest momentum?
a)
A 0.05 kg object rolling at 0.2 m/s.
b)
A 0.15 kg object rolling at 2 m/s.
c)
A 0.15 kg object rolling at 1 m/s
d)
A 0.4 kg object rolling at 2 m/s.
58.

Which of the following has the greatest momentum?

a)

a scurrying cockroach

b)

a parked semi-truck

c)

more information is needed

59.

The harder you hit a baseball, the faster it accelerates.

a)

Newton's

1st

Law of Motion

b)

Newton's

2nd

Law of Motion

c)

Newton's

3rd

Law of Motion

60.
The formula 
? = mass x acceleration
or 
? = m x a 
is used to find 
a)
Force
b)
Velocity
c)
Momentum
d)
Gravity
61.

Complete the law:


For every action, there is an ____________ reaction.

a)

equal and opposite

b)

equal

c)

opposite

d)

bigger and better

62.
A person steps out of the boat and onto the dock.  As the person moves forward onto the dock, the boat moves backward.  Which statement best describes the backward motion of the boat as the person steps forward?
a)
For every action there is an equal and opposite reaction.
b)
Every mass exerts a force on every other mass.
c)
An object at rest tends to stay at rest.
d)
Friction opposes the motion of an object.
63.

Keeping applied force constant ,if you increase the mass on an object, its acceleration

a)

decreases

b)

stays the same

c)

also increases

d)

stops

64.

What would be the reaction force, if the action force is 60 N to the right?

a)

60 N to the right

b)

60 N to the left

c)

30 N to the left

d)

9.8 N to the right

65.

Cricketer use to pull his hands backwards/downwards while catching ball , this is to ________

a)

Reduce the acceleration of ball

b)

increase time duration to reduce momentum to zero so that force decreases

c)

as he is afraid of ball

d)

none of the above

66.

V= ______

a)

1/2 gt2

b)

2gh

c)

gt

67.

The highest point of reach, final velocity is equals to ________________

a)

u = 0

b)

v = 0

68.

the motion of a freely falling body from a height or the motion of a body thrown vertically upwards is called as _________________________.

a)

two dimensional motion

b)

one dimensional motion

c)

three dimensional motion

69.

The __________ of a body is the quantity of the matter it contains

a)

velocity

b)

volume

c)

mass

d)

weight

70.

h = __________________ (for both retardation and acceleration

a)

ut - 1/2 gt2

b)

ut + 1/2 gt2

c)

u + 1/2 at2

71.

The S.I. unit of weight is __________

a)

dyne

b)

newton

c)

kgf

d)

kg

72.

1kgf = _____________N

a)

9.8

b)

9.89

c)

10

d)

10.8

73.

____________ force is the force due to gravity on a mass of 1 kg.

a)

One 100 gram

b)

One gram

c)

One kilogram

d)

One quintal

74.

Mass and weight are ____________ and ___________________ quantities respectively.

a)

vector, scalar

b)

scalar, scalar

c)

scalar, vector

d)

None of the above

75.

1gf= ____________ dyne

Speed of light is __________

a)

985

3 x107 m/s

b)

980

3 x108 m/s

c)

9800

3 x108 m/s

d)

98

3 x108 m/s

76.
What can a force do?
a)
all of the above
b)
start a motion
c)
stop a motion
d)
change the direction of the motion
77.
You hit a wall with a stick.  The equal but opposite reaction is _____
a)
the wall pushes against you
b)
the stick pushes against you
c)
you push against the stick
d)
the wall pushes against the stick
78.
A person is pushed forward into their seat belt when a car stops quickly.  Which law is this?
a)
1st
b)
 2nd
c)
2 and 3
d)
3rd 
79.
An object at rest will _______ if no outside forces are applied.
a)
stay at rest
b)
increase velocity
c)
decrease mass
d)
fall to the ground
80.
Which has more Inertia? 
a)
truck
b)
ant
c)
cat
d)
skateboard
81.
An object will always move in the direction of the _______ force.
a)
larger 
b)
smaller 
c)
equal 
82.
Which type of force(s) will cause a change in an object's motion?
a)
gravity
b)
speed
c)
balanced forces
d)
unbalanced forces
83.
If an object is at rest (not moving) the forces acting upon it are _____________
a)
unbalanced
b)
weak
c)
balanced
d)
Hulk Smash!
84.
Which law explains why a person in a car slides to the right when going through a very sharp left turn on the highway. 
a)
1st Law
b)
2nd Law
c)
3rd Law
85.
An object will not have any inertia if it is _?
a)
accelerating
b)
moving in a circle
c)
in space
d)
all objects have inertia
86.
An empty truck and a fully loaded truck are next to each other at a traffic light. When the light turns green, the lighter truck increases speed more quickly. Which law best explains this situation?
a)
Newton's first law
b)
Newton's second law
c)
Newton's third law
d)
Conservation of momentum
87.
The tendency of an object to resist changes in its motion is...
a)
inertia
b)
force
c)
acceleration
d)
velocity
88.
The force that opposes motion between two surfaces in contact with each other.
a)
inertia
b)
friction
c)
momentum
d)
gravity
89.
A force that opposes motion between a surface in contact with the atmosphere.
a)
air resistance
b)
gravity
c)
momentum
d)
terminal velocity
90.
If these boys are pulling with the same amount of force.  What will happen?
a)
The boy in blue will win.
b)
They will not move at all.
c)
The boy in red will win.
d)
Both will fall down.
91.
It takes more force to accelerate the iron man on the left than the iron man on the right because the iron man on the left has more mass. This best describes
a)
Newton's first law, the law of inertia
b)
Newton's second law, the law of acceleration
c)
Newton's third law, the law of action reaction 
d)
The law of universal gravitation
92.
What is a PUSH or PULL of an object?
a)
Motion
b)
Force
c)
Friction
d)
Gravity
93.
Why is it harder for the boy in Image B to get down the hill?
a)
Motion
b)
Friction
c)
Work
d)
Displacement
94.
If these boys are pulling with the same amount of force.  What will happen?
a)
The boy in blue will win.
b)
They will not move at all.
c)
The boy in red will win.
d)
Both will fall down.
95.
It takes more force to accelerate the iron man on the left than the iron man on the right because the iron man on the left has more mass. This best describes
a)
Newton's first law, the law of inertia
b)
Newton's second law, the law of acceleration
c)
Newton's third law, the law of action reaction 
d)
The law of universal gravitation
96.
For every action, there is an equal and opposite reaction.
a)
Newton's
1st
Law of Motion
b)
Newton's
2nd
Law of Motion
c)
Newton's
3rd
Law of Motion
97.
a)
1st
b)
2nd
c)
3rd
98.
a)
1st
b)
2nd
c)
3rd
99.
If an object is stationary (not moving) the forces acting upon it are _____________
a)
unbalanced
b)
weak
c)
balanced
d)
Hulk Smash!
100.
Name the missing force...
a)
weight force
b)
normal force
c)
applied force
d)
frictional force
101.
What is the net force
a)
10 N
b)
0 N
c)
25 N
d)
1 N
102.

A squirrel sits on the ground and eats a donut. We know the forces on him must be balanced because...

a)

Forces are always balanced

b)

the squirrel is not accelerating

c)

squirrels are projectiles

d)

he's eating a donut

103.
Are forces balanced or unbalanced when a marble speeds up rolling down a ramp?
a)
Balanced
b)
Unbalanced
104.

On a stationary sail boat, air is blown from a fan attached to the boat. The boat

a)

moves in opposite direction in which the air is blown

b)

does not move

c)

moves in the same direction in which air blows

d)

spins around

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