PHY165 Physics Modules 2 Exam
Study Questions with Correct
Answer <Expert Graded A+>
1. 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
2. What are two examples of mathematical models? - ANSWER graph
(approximate)
equation (precise)
3. if a trains is +30 miles down the track at 2:00pm and +40 miles down the
track at 3:00pm where was it at 1:00pm - ANSWER 1. find the velocity:
(40-30)/(3-2)= 10km/hr
2. use the point slope formula: x-x1 = m (t-t2) using the any point like (30,
2:00) and solve for x.
4. What is a vector? Include an example - ANSWER A mathematical object
with magnitude and direction
Ex: an arrow with a length x and direction, 55km northeast
5. What are scalars? Include an example - ANSWER objects that only have a
magnitude
Ex: a number on a number line, 35s, 55kg, 60km
,6. 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
7. Which statement BEST describes vectors and scalars? - ANSWER Vectors
have both magnitude and direction
Scalars have only magnitude
8. What is linear motion? - ANSWER when object moves in one dimension or
straight line. Ex: horizontal or vertical motion
9. T/F two balls launched at the same time height but one ball is simply
dropped and the other one is launched horizontally to the right will have the
same vertical motion - ANSWER true
10.What is parabolic motion? - ANSWER the object moves in two dimension
(both vertical and horizontal) thus following a parabolic path.
, 11.What are some important trends for an object following a parabolic path? -
ANSWER At the peak of the path the speed is zero
The object will have the same velocity going up and coming down
12.What is projectile motion and a projectile? Provide an example - ANSWER
the motion of an object without any internal energy source. The object is
called a projectile and is subject to gravity.
Ex: throwing a ball in the air to the right
13.What is not an example of a projectile? - ANSWER An airplane, rocket, car
because they all have an engine providing energy to keep it moving
14.For projectile motion problems time interval is the time it takes the projectile
to reach the maximum so you must blank to get the total flight time. -
ANSWER Double the time
15.What are components of vectors and what role do they play in motion? -
ANSWER is a piece of a vector in a certain direction. Components are
always perpendicular to each other and do not affect each other but they
affect the total motion.
16.When can velocity be zero? - ANSWER When you end up at same position
you started at.
17.Velocity is a vector quantity so you need your answer to have - ANSWER
Magnitude (m/s) and direction
Study Questions with Correct
Answer <Expert Graded A+>
1. 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
2. What are two examples of mathematical models? - ANSWER graph
(approximate)
equation (precise)
3. if a trains is +30 miles down the track at 2:00pm and +40 miles down the
track at 3:00pm where was it at 1:00pm - ANSWER 1. find the velocity:
(40-30)/(3-2)= 10km/hr
2. use the point slope formula: x-x1 = m (t-t2) using the any point like (30,
2:00) and solve for x.
4. What is a vector? Include an example - ANSWER A mathematical object
with magnitude and direction
Ex: an arrow with a length x and direction, 55km northeast
5. What are scalars? Include an example - ANSWER objects that only have a
magnitude
Ex: a number on a number line, 35s, 55kg, 60km
,6. 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
7. Which statement BEST describes vectors and scalars? - ANSWER Vectors
have both magnitude and direction
Scalars have only magnitude
8. What is linear motion? - ANSWER when object moves in one dimension or
straight line. Ex: horizontal or vertical motion
9. T/F two balls launched at the same time height but one ball is simply
dropped and the other one is launched horizontally to the right will have the
same vertical motion - ANSWER true
10.What is parabolic motion? - ANSWER the object moves in two dimension
(both vertical and horizontal) thus following a parabolic path.
, 11.What are some important trends for an object following a parabolic path? -
ANSWER At the peak of the path the speed is zero
The object will have the same velocity going up and coming down
12.What is projectile motion and a projectile? Provide an example - ANSWER
the motion of an object without any internal energy source. The object is
called a projectile and is subject to gravity.
Ex: throwing a ball in the air to the right
13.What is not an example of a projectile? - ANSWER An airplane, rocket, car
because they all have an engine providing energy to keep it moving
14.For projectile motion problems time interval is the time it takes the projectile
to reach the maximum so you must blank to get the total flight time. -
ANSWER Double the time
15.What are components of vectors and what role do they play in motion? -
ANSWER is a piece of a vector in a certain direction. Components are
always perpendicular to each other and do not affect each other but they
affect the total motion.
16.When can velocity be zero? - ANSWER When you end up at same position
you started at.
17.Velocity is a vector quantity so you need your answer to have - ANSWER
Magnitude (m/s) and direction
