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Chapter 1 and 2 Review TEST

Total questions: 51

Worksheet time: 2hrs 44mins

Name
Class
Date
1.

What is the net force?


5N, 22N, and 31N to the right; 5N, 16N, 10N, and 27N to the left.

a)

0N

b)

2N to the right

c)

2N to the left

d)

10N to the right

2.
Vector or Scalar? 
45N to right
a)
Vector
b)
Scalar
3.
Vector or Scalar? 
75mph
a)
Vector
b)
Scalar
4.
What forces are acting on a book on a table? 
a)
upward force of table
b)
downward force of gravity
c)
both of these
d)
none of these
5.

When an object is at rest on a horizontal surface we can say that...

a)

the support/normal force is equal to the weight.

b)

the support/normal force is less than the weight.

c)

the support/normal force is greater that the weight.

d)

the support/normal force is equal to zero.

6.

If a desk is pushed at a constant speed across the floor, then the friction force is (a)   ?

7.

Objects at rest experience (a)   equilibrium. (static, dynamic.)

8.

Objects moving at a constant speed in a straight line experience (a)   equilibrium. (static, dynamic.)

9.
The net force on an object is the combination of all the forces that act on it. 
a)
True
b)
False
10.
The equilibrium rule, ΣF=0, applies to...
a)
vectors
b)
scalars
c)
both of these
d)
neither of these
11.

When Nellie Newton hangs by a pair of vertical ropes, the tension in each rope will be...

(a)  

12.

How do you know that a hypothesis is scientific ?

a)

A hypothesis is scientific if there is a test that can prove it wrong.

b)

A hypothesis is scientific when enough important people refer to it.

c)

All hypotheses are scientific.

13.

Gina drops a 700 g bowling ball and a 1 gram rock from a cliff. Which will hit the ground first?

a)

Bowling Ball

b)

Rock

c)

Ignoring air resistance, both will hit at the same time.

d)

The cliff

e)

neither

14.
Forming a hypothesis is an important part of the scientific process.  A hypothesis is.....
a)
a question that scientists form during their investigation.
b)
a statement of what scientists think will happened during an investigation.
c)
an opinion that all scientists must learn to agree with.
d)
a set of data that is recorded during the investigation.
15.
An observation is...
a)
a data chart that scientists analyze for results.
b)
a great way to form opinions about science.
c)
a great way for scientists to have fun!
d)
something you find out about objects, events or living things by using your senses.  
16.
What is the purpose of an experiment?
a)
To have a great amount of fun!
b)
To use the scientific methods to test your hypothesis. 
c)
To gather data and share findings.
d)
What is an experiment??
17.

Other scientists must be able to repeat scientific investigations more than once.

a)

True

b)

False

18.

Which of these are CORRECT about the importance of science? (Choose more than one answer.)

a)

Easy to find job

b)

Faster and safer transportation

c)

Invention of satellites, computers and phones.

d)

Advancements in medical innovations.

19.

The force of gravity on a person or object on the surface of a planet is called (a)   ?

20.

The force that one surface exerts on another when the two rub against each other is called________?

a)

friction.

b)

inertia.

c)

acceleration

d)

gravity

21.

Any force that causes an object to move is called a(n) ______? (More than one right answer.)

a)

balanced force.

b)

gravitational force.

c)

unbalanced force.

d)

net force.

22.

The overall force on an object after all the forces are added together is called the

a)

balanced force

b)

unbalanced force

c)

net force

d)

centripetal force

23.

Which of the following is NOT a branch of natural science?

a)

Life

b)

Social

c)

Physical

d)

Earth and space

24.

What is a statement that summarizes a pattern found in nature?

a)

a scientific law

b)

a scientific theory

c)

hypothesis

d)

fact

25.

A wheeled cart is moving to the right at a constant speed. Two forces of equal magnitude are acting upon the cart. Which of the following best describes the forces and motion of the cart?

a)

Balanced Forces, Constant Speed

b)

Balanced Forces, Acceleration

c)

Unbalanced Forces, Constant Speed

d)

Unbalanced Forces, Acceleration

26.
If two forces act on an object in the same direction, the net force is the _____________
a)
the difference between the two forces
b)
the sum of the two forces
c)
Only one of the forces acts on the object
d)
DOOMSDAY!
27.

What is a force?

4 lines
28.

Force is measured in....

a)

Galileos .

b)

Newtons.

c)

Di Vincis.

d)

Einsteins .

29.

You're pushing a 20 kg box with a rightward force of 30 N. If the friction force is 10 N, what is the net force on the box?

a)

0 N

b)

2-N rightward

c)

20-N leftward

d)

20-N rightward

30.
Which statement describes a vector?
a)
It has magnitude but no direction
b)
It has direction but no magnitude
c)
It has both direction and magnitude
d)
It has constant magnitude but no
 direction
31.
Is this a scalar quantity or a vector quantity?
Wind blowing at 20 knots
a)
Scalar
b)
Vector
32.

Find the normal force.

a)

0 units

b)

5 units upward

c)

-5 units downward

d)

4 units leftward

33.

A girl whose weight is 200 N hangs from a bar supported by two strands of rope. What is the tension from each strand?

(a)  

34.

What is the net force?

a)

50 N ------->

b)

<-------- -200 N

c)

250 N -------------->

d)

0 N

35.

An object in motion tends to stay in motion unless a(n) (a)   force acts on it.

36.
If two forces are balanced, what is the net force?
a)
zero
b)
negative
c)
positive
37.

Weight is ________________________.

a)

the force of gravity on an object.

b)

the amount of matter in an object.

c)

neither.

d)

both.

38.

How much of Mr. West's class will study and do well on the test on Thursday / Friday?

a)

100%

b)

50%

c)

25%

d)

0%

39.

What is a force that opposes motion between any surfaces that are touching?

(a)  

40.
If an object in mechanical equilibrium is stable, then it is without __________
a)
changes in motion
b)
rest or relaxation
c)
inconsistency
d)
the force being used by Darth Vadar
41.

Equilibrium means (a)  

42.

A vector means there is __________ and __________

a)

speed and velocity

b)

tension and weight

c)

balance and tauntness

d)

magnitude and direction

43.
What does this mean?
a)
sum of forces equals zero
b)
everyone forget physics
c)
Billy and Bob will be falling 140 ft and 110 ft respectfully
d)
Billy and Bob's effective faith in their balance is zero
44.
What is the net force on a bathroom scale when a 110 lb person stands on it?
a)
110 lb
b)
110 N
c)
0 lbs
d)
50 lbs 
45.

For an object at rest on a horizontal surface, the __________ must equal the object's weight

a)

Net Force

b)

Support/Normal Force

c)

Force

d)

Equilibrium

46.
Static Equilibrium means ____
a)
Objects at rest
b)
moving objects
c)
that which is in outer space
d)
electrical balance
47.
A resultant is __________
a)
the sum of two or more vectors
b)
all the addition you did
c)
combination of forces together 
d)
what happens when two people get on a scale together
48.
If the children are each 50 N, what must be the tension of one of the ropes?
a)
100N
b)
50 N
c)
100 lbs
d)
50 lbs
49.
A 600 N Acrobat that hangs motionless from 3 ropes has a Net Force of
a)
0 N
b)
200 N
c)
400 N
d)
600 N
50.
The length of a force vector represents the ______ of the force
a)
direction
b)
magnitude
c)
type
d)
cause
51.
What is the value of the missing tension force?
a)
170 lbs
b)
150 lbs
c)
120 lbs

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