PHYSICS 165 Module 2 Exam
Questions and Answers
The motion of two balls is being analyzed. They are both set in motion at the same time
and from the same height. The red ball is dropped, and the green ball is launched
horizontally. Air resistance is negligible. Which of the following statements is TRUE? -
Answer- a) The red ball will hit the ground with a greater magnitude of vertical velocity.
b) The green ball will hit the ground with a greater magnitude of vertical velocity.
c) The two balls will hit the ground with the same magnitude of vertical velocity.
d) It is impossible to predict which one will hit the ground with a greater magnitude of
vertical velocity.
Answer: B
The motion of two balls is being analyzed. They are both set in motion at the same time
and from the same height. The red ball is dropped, and the green ball is launched
horizontally. Air resistance is negligible. Which of one of the balls will have the greater
acceleration? - Answer- The acceleration of both balls is equal to 9.80m/s^2
When two vectors are in the same direction, how do you calculate the magnitude of
their sum? - Answer- Add the magnitudes of the vectors
When two vectors are in opposite directions, how do you calculate the magnitude of
their sum? - Answer- You take the difference of the two vectors which calculates the
magnitude of their sum
When finding the magnitude of the sum of two vectors, when is it appropriate to us the
Pythagorean theorem? - Answer- a) When the vectors are in the same direction
b) When the vectors are in opposite directions
c) When the vectors are perpendicular to each other
d) It is always appropriate to add the magnitudes of vectors no matter their orientation to
each other.
Answer: C
True or False: Kinematics is the branch of physics which is concerned with the motion
of objects without regard to the forces that affect the motion. - Answer- True
, Match the physical quantity in the left column with the appropriate question in the right
column. Each choice will be used exactly once.
Position
Displacement
Time Interval
Speed - Answer- Where is it?
How far did it go?
How long did it take?
How fast did it go?
Your place of work is 2.0 miles directly west of the post office. Your house is 1.5 miles
directly north of the post office. You live in a city where the streets all run either north-
south or east-west. On your way home from work you stop at the post office to drop of
some mail. Your trip begins at 4:50 pm and ends at 5:05 pm. Determine the following
physical quantities:
a. The time interval of your trip _____
b. Your distance traveled _____
c. The magnitude of the displacement for this trip _____
d. The average speed of your trip _____
e. The magnitude of the average velocity of your trip _____ - Answer- a) 5:05pm -
4:50pm = 15 minutes
b) 2.0 miles + 1.5 miles = 3.5 miles
c) a^2+b^2=c^2
2^2+1.5^2 = c^2 c= 2.5 miles
d) v=d/t answer in mph
e v=d/t answer in mph
Which statement BEST describes vectors and scalars? - Answer- Vectors have both
magnitude and direction
Scalars have only magnitude
A security guard walks around the perimeter of a building during one of his rounds. The
distance he travels around the building is 528 m and it takes him 367 s to complete one
lap around the building. Determine the following physical quantities:
a. His average speed _____
b. His average velocity _____ - Answer- a) v=d/t answer in m/s
b) v=d/t answer is zero since he starts and stops in the same place
For a truck travelling at a uniform speed, the ______________. - Answer- a)
acceleration must be the same for each second
b) acceleration must be the same for each second
c) directions during the first, second, and third seconds must be equal
d) displacement traveled during the first, second, and third seconds must be equal
Answer C
Questions and Answers
The motion of two balls is being analyzed. They are both set in motion at the same time
and from the same height. The red ball is dropped, and the green ball is launched
horizontally. Air resistance is negligible. Which of the following statements is TRUE? -
Answer- a) The red ball will hit the ground with a greater magnitude of vertical velocity.
b) The green ball will hit the ground with a greater magnitude of vertical velocity.
c) The two balls will hit the ground with the same magnitude of vertical velocity.
d) It is impossible to predict which one will hit the ground with a greater magnitude of
vertical velocity.
Answer: B
The motion of two balls is being analyzed. They are both set in motion at the same time
and from the same height. The red ball is dropped, and the green ball is launched
horizontally. Air resistance is negligible. Which of one of the balls will have the greater
acceleration? - Answer- The acceleration of both balls is equal to 9.80m/s^2
When two vectors are in the same direction, how do you calculate the magnitude of
their sum? - Answer- Add the magnitudes of the vectors
When two vectors are in opposite directions, how do you calculate the magnitude of
their sum? - Answer- You take the difference of the two vectors which calculates the
magnitude of their sum
When finding the magnitude of the sum of two vectors, when is it appropriate to us the
Pythagorean theorem? - Answer- a) When the vectors are in the same direction
b) When the vectors are in opposite directions
c) When the vectors are perpendicular to each other
d) It is always appropriate to add the magnitudes of vectors no matter their orientation to
each other.
Answer: C
True or False: Kinematics is the branch of physics which is concerned with the motion
of objects without regard to the forces that affect the motion. - Answer- True
, Match the physical quantity in the left column with the appropriate question in the right
column. Each choice will be used exactly once.
Position
Displacement
Time Interval
Speed - Answer- Where is it?
How far did it go?
How long did it take?
How fast did it go?
Your place of work is 2.0 miles directly west of the post office. Your house is 1.5 miles
directly north of the post office. You live in a city where the streets all run either north-
south or east-west. On your way home from work you stop at the post office to drop of
some mail. Your trip begins at 4:50 pm and ends at 5:05 pm. Determine the following
physical quantities:
a. The time interval of your trip _____
b. Your distance traveled _____
c. The magnitude of the displacement for this trip _____
d. The average speed of your trip _____
e. The magnitude of the average velocity of your trip _____ - Answer- a) 5:05pm -
4:50pm = 15 minutes
b) 2.0 miles + 1.5 miles = 3.5 miles
c) a^2+b^2=c^2
2^2+1.5^2 = c^2 c= 2.5 miles
d) v=d/t answer in mph
e v=d/t answer in mph
Which statement BEST describes vectors and scalars? - Answer- Vectors have both
magnitude and direction
Scalars have only magnitude
A security guard walks around the perimeter of a building during one of his rounds. The
distance he travels around the building is 528 m and it takes him 367 s to complete one
lap around the building. Determine the following physical quantities:
a. His average speed _____
b. His average velocity _____ - Answer- a) v=d/t answer in m/s
b) v=d/t answer is zero since he starts and stops in the same place
For a truck travelling at a uniform speed, the ______________. - Answer- a)
acceleration must be the same for each second
b) acceleration must be the same for each second
c) directions during the first, second, and third seconds must be equal
d) displacement traveled during the first, second, and third seconds must be equal
Answer C
