REVIEWER
1. Which is a vector quantity?
a. The age of the earth
b. The earth’s pull on your body - have magnitude and direction
c. The mass of a football
D. The temperature of your body
2. Which of the following statements concerning vectors and scalar is FALSE? -
A. Two vectors can be added only if they have direction
B. It is possible to use component methods in scalars.
C. A vector quantity may either be positive or negative.
D. A scalar quantity may either be positive or negative - can’t be negative kasi for example
yung sa distance, wala namang negative na distance
3. A. 32-N force is applied at 65 deg. Above the horizontal to accelerate a cart. What are the
magnitudes of the horizontal (FH) and vertical component (FV) of this force?
A. Fh= 13.5 N and Fv= 29.0 N
B. Fh= 29.0 N and Fv= 13.5 N
C. Fh= 68.62 N and Fv= 13.5 N
D. Fh= 20 N and Fv= 14 N
Solution:
- Fx= 32sin65◦=29.0 N
- Fy= 32cos65◦=13.5 N
4. What is the distance covered by the car if it moved 45 km, East and 65 km, West?
a. 20 Km c. 20 km, West
b. 110 Km d. 110 km, East
Solution:
, 45km + 65km = 110km - total distance covered
5. An ant on a picnic table travels 15 cm eastward, then 25 cm southward. What are the
magnitude and the direction of the ant’s displacement relative to its original position?
a. d= 29.2 cm; θ= 59 deg S of E
b. d= 29.2 cm; θ= 59 deg N of E
c. d= 15.8 cm; θ= 31 deg S of E
d. d= 15.8 cm; θ= 31 deg N of E
Solution:
Pythagorean theorem
2 2
- d= 15 + 25 =29.2cm
25
- tan^ − 1( 15 ) = 59 𝑑𝑒𝑔 𝑁 𝑜𝑓 𝐸
6. An object is slowing down along a straight road. Which of the following statement is TRUE
regarding its velocity and acceleration vectors? -
a. They are perpendicular to each other
b. They are parallel to each other.
c. They are antiparallel to each other.
d. The acceleration vector exist but the velocity vectors does not exist.
7. A water balloon is dropped from the roof of a tall building and takes 3 s before it reaches the
ground. What is the balloon’s initial velocity
a. 0 m/s- kasi initial velocity hinahanap
b. -9.8 m/s
c. 3 m/s
d. -4.5 m/s
8. Is it possible for an object moving at a constant speed to accelerate? D? Pa check a
a. Yes, If an object is moving it can experience acceleration.
b. No, If the speed is constant then the acceleration is equal to zero
c. No, an object can accelerate only if there is no net force acting on it.
d. Yes, although the speed is constant, the direction of the velocity is changing.
9.In 2.0 hrs, a car increases its speed from 60km/h to 65km/h while a bicycle goes from rest to
5km/h. Which has greater acceleration? C
1. Which is a vector quantity?
a. The age of the earth
b. The earth’s pull on your body - have magnitude and direction
c. The mass of a football
D. The temperature of your body
2. Which of the following statements concerning vectors and scalar is FALSE? -
A. Two vectors can be added only if they have direction
B. It is possible to use component methods in scalars.
C. A vector quantity may either be positive or negative.
D. A scalar quantity may either be positive or negative - can’t be negative kasi for example
yung sa distance, wala namang negative na distance
3. A. 32-N force is applied at 65 deg. Above the horizontal to accelerate a cart. What are the
magnitudes of the horizontal (FH) and vertical component (FV) of this force?
A. Fh= 13.5 N and Fv= 29.0 N
B. Fh= 29.0 N and Fv= 13.5 N
C. Fh= 68.62 N and Fv= 13.5 N
D. Fh= 20 N and Fv= 14 N
Solution:
- Fx= 32sin65◦=29.0 N
- Fy= 32cos65◦=13.5 N
4. What is the distance covered by the car if it moved 45 km, East and 65 km, West?
a. 20 Km c. 20 km, West
b. 110 Km d. 110 km, East
Solution:
, 45km + 65km = 110km - total distance covered
5. An ant on a picnic table travels 15 cm eastward, then 25 cm southward. What are the
magnitude and the direction of the ant’s displacement relative to its original position?
a. d= 29.2 cm; θ= 59 deg S of E
b. d= 29.2 cm; θ= 59 deg N of E
c. d= 15.8 cm; θ= 31 deg S of E
d. d= 15.8 cm; θ= 31 deg N of E
Solution:
Pythagorean theorem
2 2
- d= 15 + 25 =29.2cm
25
- tan^ − 1( 15 ) = 59 𝑑𝑒𝑔 𝑁 𝑜𝑓 𝐸
6. An object is slowing down along a straight road. Which of the following statement is TRUE
regarding its velocity and acceleration vectors? -
a. They are perpendicular to each other
b. They are parallel to each other.
c. They are antiparallel to each other.
d. The acceleration vector exist but the velocity vectors does not exist.
7. A water balloon is dropped from the roof of a tall building and takes 3 s before it reaches the
ground. What is the balloon’s initial velocity
a. 0 m/s- kasi initial velocity hinahanap
b. -9.8 m/s
c. 3 m/s
d. -4.5 m/s
8. Is it possible for an object moving at a constant speed to accelerate? D? Pa check a
a. Yes, If an object is moving it can experience acceleration.
b. No, If the speed is constant then the acceleration is equal to zero
c. No, an object can accelerate only if there is no net force acting on it.
d. Yes, although the speed is constant, the direction of the velocity is changing.
9.In 2.0 hrs, a car increases its speed from 60km/h to 65km/h while a bicycle goes from rest to
5km/h. Which has greater acceleration? C
