Physics 1 Final Exam
1. A ball is thrown straight upward. How does the sign of the work done by gravity
while the ball is traveling upward compare with the sign of the work done by gravity
while the ball is traveling downward? - ------------ANS: Work done by gravity is
negative while the ball is traveling upward and positive while the ball is travelling
downward
2. A constant net force acts on an object. Which of the following best describes the
object's motion?
a. The object is at rest; its position is constant
b. The object is moving with a constant velocity
c. The object is moving with a constant acceleration
d. The object is moving with an increasing acceleration
e. The object is moving with a decreasing acceleration - ------------ANS: c. The object
is moving with a constant acceleration
3. A constant net torque is applied to a rotating object. Which of the following best
describes the object's motion? - ------------ANS: The object will rotate with constant
angular acceleration
4. A football player kicks a football in a field goal attempt. When the football reaches
its maximum height, what is the relationship between the direction of the velocity and
acceleration vectors? Assume air resistance is negligible. - ------------ANS: v and a
are perpendicular to each other
5. A girl and a boy are riding on a merry-go-round that is turning at a constant rate.
The girl is near the outer edge, and the boy is closer to the center. Who has greater
angular displacement? - ------------ANS: Both the girl and the boy have the same
nonzero angular displacement
6. A girl and a boy are riding on a merry-go-round that is turning at a constant rate.
The girl is near the outer edge, and the boy is closer to the center. Who has greater
linear speed? - ------------ANS: The girl
7. A girl and a boy are riding on a merry-go-round that is turning at a constant rate.
The girl is near the outer edge, and the boy is closer to the center. Who has greater
tangential acceleration? - ------------ANS: They both have 0 tangential acceleration
8. A graph depicts force versus position. What represents the work done by the force
over the given displacement? - ------------ANS: Work done is equal to the area under
the curve
, 9. A jar is completely filled with water, and then it is sealed with a lid. If you push
down on the lid with a pressure of 1000 Pa, what happens to the water pressure at
the bottom of the jar? - ------------ANS: The water pressure at the bottom of the jar
will increase by 1000 Pa
10. A mass on the end of a spring undergoes simple harmonic motion. At the instant
when the mass is at its equilibrium position, what is its instantaneous acceleration? -
------------ANS: 0
11. A mass on the end of a spring undergoes simple harmonic motion. At the instant
when the mass is at its equilibrium position, what is its instantaneous velocity? -
------------ANS: Instantaneous velocity is at its maximum
12. A particle moves with constant acceleration a. the expression v_i + at represents
the particles velocity at what instant in time? - ------------ANS: When a time t has
passed since the beginning of the particle's motion, when its velocity was v_i.
13. A person applies a 50 N force on a crate, causing it to move horizontally at a
constant speed through a distance of 10 m. What is the net work done on the crate?
- ------------ANS: 0 J
14. A player kicks a soccer ball in a high arc toward the opponent's goal. When the
soccer ball reaches its maximum height, how does its speed at this point compare to
its initial speed? Assume air resistance is negligible. - ------------ANS: The speed at
its highest point is less than its initial speed
15. A standing wave is established in an organ pipe that is closed at one end. What
is located at the open and closed ends of the pipe? - ------------ANS: A displacement
antinode is located at the open end, and a displacement node is located at he closed
end
16. A standing wave is established on a string that is fixed at both ends. If the string
is vibrating at its fundamental frequency, how is the length of the string related to the
wavelength of the standing wave? - ------------ANS: the length of a string is equal to
1/2 of a wavelength
17. A strong wind blows over the house shown in the figure. The wind is much
stronger over the house's roof than lower down, and the house has an open
chimney. A window on the ground floor is open, and so are the doors inside the
house. Which way will air flow through the house? - ------------ANS: In the window
and out the chimney because air pressure is lower at the chimney and higher outside
the window
18. A vector has, by definition, both _____ and direction. - ------------ANS: Magnitude
1. A ball is thrown straight upward. How does the sign of the work done by gravity
while the ball is traveling upward compare with the sign of the work done by gravity
while the ball is traveling downward? - ------------ANS: Work done by gravity is
negative while the ball is traveling upward and positive while the ball is travelling
downward
2. A constant net force acts on an object. Which of the following best describes the
object's motion?
a. The object is at rest; its position is constant
b. The object is moving with a constant velocity
c. The object is moving with a constant acceleration
d. The object is moving with an increasing acceleration
e. The object is moving with a decreasing acceleration - ------------ANS: c. The object
is moving with a constant acceleration
3. A constant net torque is applied to a rotating object. Which of the following best
describes the object's motion? - ------------ANS: The object will rotate with constant
angular acceleration
4. A football player kicks a football in a field goal attempt. When the football reaches
its maximum height, what is the relationship between the direction of the velocity and
acceleration vectors? Assume air resistance is negligible. - ------------ANS: v and a
are perpendicular to each other
5. A girl and a boy are riding on a merry-go-round that is turning at a constant rate.
The girl is near the outer edge, and the boy is closer to the center. Who has greater
angular displacement? - ------------ANS: Both the girl and the boy have the same
nonzero angular displacement
6. A girl and a boy are riding on a merry-go-round that is turning at a constant rate.
The girl is near the outer edge, and the boy is closer to the center. Who has greater
linear speed? - ------------ANS: The girl
7. A girl and a boy are riding on a merry-go-round that is turning at a constant rate.
The girl is near the outer edge, and the boy is closer to the center. Who has greater
tangential acceleration? - ------------ANS: They both have 0 tangential acceleration
8. A graph depicts force versus position. What represents the work done by the force
over the given displacement? - ------------ANS: Work done is equal to the area under
the curve
, 9. A jar is completely filled with water, and then it is sealed with a lid. If you push
down on the lid with a pressure of 1000 Pa, what happens to the water pressure at
the bottom of the jar? - ------------ANS: The water pressure at the bottom of the jar
will increase by 1000 Pa
10. A mass on the end of a spring undergoes simple harmonic motion. At the instant
when the mass is at its equilibrium position, what is its instantaneous acceleration? -
------------ANS: 0
11. A mass on the end of a spring undergoes simple harmonic motion. At the instant
when the mass is at its equilibrium position, what is its instantaneous velocity? -
------------ANS: Instantaneous velocity is at its maximum
12. A particle moves with constant acceleration a. the expression v_i + at represents
the particles velocity at what instant in time? - ------------ANS: When a time t has
passed since the beginning of the particle's motion, when its velocity was v_i.
13. A person applies a 50 N force on a crate, causing it to move horizontally at a
constant speed through a distance of 10 m. What is the net work done on the crate?
- ------------ANS: 0 J
14. A player kicks a soccer ball in a high arc toward the opponent's goal. When the
soccer ball reaches its maximum height, how does its speed at this point compare to
its initial speed? Assume air resistance is negligible. - ------------ANS: The speed at
its highest point is less than its initial speed
15. A standing wave is established in an organ pipe that is closed at one end. What
is located at the open and closed ends of the pipe? - ------------ANS: A displacement
antinode is located at the open end, and a displacement node is located at he closed
end
16. A standing wave is established on a string that is fixed at both ends. If the string
is vibrating at its fundamental frequency, how is the length of the string related to the
wavelength of the standing wave? - ------------ANS: the length of a string is equal to
1/2 of a wavelength
17. A strong wind blows over the house shown in the figure. The wind is much
stronger over the house's roof than lower down, and the house has an open
chimney. A window on the ground floor is open, and so are the doors inside the
house. Which way will air flow through the house? - ------------ANS: In the window
and out the chimney because air pressure is lower at the chimney and higher outside
the window
18. A vector has, by definition, both _____ and direction. - ------------ANS: Magnitude
