The Glenelg School of Abu Dhabi
T1 TEST 2
Subject:
Physics I
Unit/Topic:
Ch: 3&4
Minutes:
45
Student’s Marking Scheme
Name:
Grade
Level:
9
Section:
50
Date:
Student ID
Number
Student’s
Mark:
%
Answer the following Questions:
I- Shade the correct answer on the Bubble Sheet:
(30 pts, 1 pt each)
1- Which of the following is a physical quantity that has a magnitude but no direction?
a. vector
b. diagonal
c. scalar
d. frame of reference
2- Which of the following is a physical quantity that has both magnitude and direction?
a.
vector
b.
diagonal
c.
scalar
d.
frame of reference
3- Which of the following is an example of a vector quantity?
a.
velocity
b.
volume
c.
temperature
d.
mass
4- Identify the following quantities as scalar or vector: the speed of a snail, the time it takes to run a mile,
the free-fall acceleration.
a. vector, scalar, scalar
b.
vector, scalar, vector
c.
d.
scalar, vector, vector
scalar, scalar, vector
5- The projection of a vector along the axes of a coordinate system is called
a.
resultant of vectors
b.
component of a vector
c.
projectile
d.
scalar
Science Department: Physics I - Test 2
GSAD Summative Assessment: Page 1 of 8
The Glenelg School of Abu Dhabi
6- The head (tip) of the vector arrow represents
a.
the magnitude of the vector.
b.
the origin of the vector.
c.
the direction of the vector.
d.
all of the above
7- Which of the following is not a property of vectors?
a.
Vectors can be moved parallel to themselves in a diagram.
b.
Vectors can be added in any order.
c.
Vectors can be added graphically.
d.
Vectors do not show directions.
8- Negative of a vector is defined as
a.
vector with the same magnitude as the original vector but opposite in direction.
b.
vector with different magnitude from the original vector and opposite direction.
c. vector with different magnitude from the original vector but same direction.
d.
vector with the same magnitude as the original vector and same direction.
⃗⃗ = 4.0 m points eastward, and vector 𝑁
⃗ = 3.0 m points westward. The resultant vector
9- Vector 𝑀
⃗⃗ + 𝑁
⃗ is given by
𝑀
a. 7.0 m east

b.
3.5 m west
c.
1.0 m west
d.
1.0 m east
10- Multiplying or dividing vectors by scalars results in
a. vectors.
b. scalars.
c. vectors if multiplied or scalars if divided.
d. scalars if multiplied or vectors if divided.
Science Department: Physics I - Test 2
GSAD Summative Assessment: Page 2 of 8
The Glenelg School of Abu Dhabi
11- In vector addition, the resultant of two or more vectors is drawn from the _____ of the _____ vector
to the _______ of the _____ vector.
a. head, first, tail, last
b.
tail, first, head, last
c. head, last, tail, first
d. tail, last, head, first
12- The sum of two vectors could be zero when they have the ______ magnitude and _____ directions.
a. same, same
b. opposite, opposite
c.
same, opposite
d. opposite, same
13- Which of the following statements does not describe force?
a.
b.
c.
d.
Force causes objects at rest to remain stationary.
Force causes objects to start moving.
Force causes objects to stop moving.
Force causes objects to change direction of motion.
14- A newton is equivalent to which of the following quantities?
a.
kg
c.
kg.m/s
b.
kg.m/s
d.
kg.(m/s)
15- A free-body diagram represents all of the following except
a.
the object.
c.
forces exerted by the object.
b.
forces as vectors.
d.
forces exerted on the object.
16- The statement by Newton that for every action there is an equal but opposite reaction is which of his
laws of motion?
a.
first
c.
third
b.
second
d.
fourth
Science Department: Physics I - Test 2
GSAD Summative Assessment: Page 3 of 8
The Glenelg School of Abu Dhabi
17- Newton’s third law of motion involves the interactions of
a.
one object and one force.
c.
two objects and one force.
b.
one object and two forces.
d.
two objects and two forces.
18- A ball is dropped from a person’s hand and falls to Earth. Identify an action-reaction pair in this
situation.
a.
b.
c.
d.
The hand exerts a force on the ball; Earth exerts a force on the hand.
Earth exerts a force on the ball; the hand exerts a force on Earth.
Earth exerts a force on the hand; the hand exerts a force on the ball.
Earth exerts a force on the ball; the ball exerts a force on Earth.
19- The magnitude of the gravitational force acting on an object is
a.
frictional force.
c.
inertia.
b.
weight.
d.
mass.
20- The SI unit of force is
a.
newtons
c.
joules
b.
watts
d.
all of the above
21- An example on contact force is
a.
Electric force
b.
Normal force
c.
Gravitational force
d.
All of the above
22- An example on field force is
a.
Friction force
b.
Normal force
c.
Gravitational force
d.
All of the above
23- What does ∑ 𝐹 represent?
a.
b.
Gravitational force
Net force
c.
d.
Science Department: Physics I - Test 2
Contact force
Both a and b
GSAD Summative Assessment: Page 4 of 8
The Glenelg School of Abu Dhabi
24-
An action exerted on an object which may change the object’s state of rest or motion is called
a.
b.
c.
d.
acceleration
inertia
mass
force
25-
Force is a vector quantity because
a.
b.
it doesn’t show direction
it shows direction
c.
d.
it shows magnitude
it doesn’t show magnitude
26- The state in which the net force on an object is zero is called
a.
b.
friction
inertia
c.
d.
acceleration
equilibrium
27- If a car is traveling westward with a constant velocity of 20 m/s, what is the net force acting on the
a.
b.
car?
zero
20 N
c.
d.
2N
we need to know the mass of the car
28- Newton’s second law of motion states that
a.
b.
c.
d.
acceleration is directly proportional to the net force and inversely proportional to the mass.
acceleration is inversely proportional to the net force and directly proportional to the mass.
acceleration is directly proportional to the net force and to the mass.
acceleration is inversely proportional to the net force and to the mass.
29- Wherever there is an action force, there must be a reaction force which
a.
b.
c.
d.
always acts in the same direction
is slightly smaller in magnitude than the action force
is slightly larger in magnitude than the action force
is exactly equal in magnitude
30- A baseball player bats a ball with a force of 1000 N. The magnitude of the reaction force that the ball
exerts against the bat is
a.
b.
c.
d.
less than 1000 N
more than 1000 N
1000 N
impossible to determine
Science Department: Physics I - Test 2
GSAD Summative Assessment: Page 5 of 8
The Glenelg School of Abu Dhabi
II - In each of the following cases construct the resultant of each two vectors: (4 pts, 1 pt each)
a-
b-
c-
d-
Science Department: Physics I - Test 2
GSAD Summative Assessment: Page 6 of 8
The Glenelg School of Abu Dhabi
III- In each of the following cases, draw the horizontal and vertical components of the given vector.
(2 pts, 1 pt each)
a-
b-
IV - Draw the vector arrow of a truck going 200 km/h to the left. Use a scale of 50 km/h per cm.
(2 pts)
Length= magnitude / scale
= 200 / 50
= 4 cm
V - Two horizontal forces, 50 N and 10 N are exerted on a wagon; find the magnitude of the
resultant force on the wagon
a- if these forces are applied in the same direction.
R= F1 + F2
(2 pts)
(1 pt)
= 50 + 10
= 60 N
(1 pt)
b- if these forces are applied in opposite directions.
R= F1 - F2
(2 pts)
(1 pt)
= 50 - 10
= 40 N
(1 pt)
Science Department: Physics I - Test 2
GSAD Summative Assessment: Page 7 of 8
The Glenelg School of Abu Dhabi
VI - Calculate the magnitude of the resultant of the pair of velocities 3 km/h north and 4 km/h
east.
(2 pts)
c2 = a2 + b2 or
R2 = V12 + V22
(1 pt)
= 32 + 42
= 9 + 16 = 25
R= 5 km/h
(1 pt)
VII- A falling 5 kg ball encounters 8 N of air resistance. (g= 9.8 m/s2)
a. What is the weight of the ball in newton?
w=m×g
= 5.0 × 9.8
= 49 N
downwards
(2 pts)
(1 pt)
(1 pt)
b. Calculate the net force acting on the falling ball.
Fnet = F1 – F2
= 49 – 8.0
= 41 N
downwards
(1 pt)
(1 pt)
c. Calculate its acceleration.
a = Fnet / m
= 41 / 5
= 8.2 m/s2
(2 pts)
(2 pts)
(1 pt)
downwards
Science Department: Physics I - Test 2
(1 pt)
GSAD Summative Assessment: Page 8 of 8