ASU Physics 121 Final Exam Questions
with complete solution 2025
Two objects are thrown from the top of a tall building and experience no
appreciable air resistance. One is thrown up, and the other is thrown down,
both with the same initial speed. What are their speeds when they hit the
street? - correct answer ✔They are traveling at the same speed.
Suppose that a car traveling to the west (the -x direction) begins to slow down
as it approaches a traffic light. Which statement concerning its acceleration in
the x direction is correct? - correct answer ✔Its acceleration is positive but its
velocity is negative.
For general projectile motion, when the projectile is at the highest point of its
trajectory - correct answer ✔its velocity is perpendicular to the acceleration.
Alice and Tom dive from an overhang into the lake below. Tom simply drops
straight down from the edge, but Alice takes a running start and jumps with an
initial horizontal velocity of 25 m/s. Neither person experiences any significant
air resistance. Compare the time it takes each of them to reach the lake
below. - correct answer ✔Alice and Tom will reach the surface of the lake at
the same time.
A pilot drops a package from a plane flying horizontally at a constant speed.
Neglecting air resistance, when the package hits the ground the horizontal
location of the plane will - correct answer ✔be over the package.
If an object travels at a constant speed in a circular path, the acceleration of
the object is - correct answer ✔larger in magnitude the smaller the radius of
the circle.
, An object moves in a circular path at a constant speed. What is the
relationship between the directions of the object's velocity and acceleration
vectors? - correct answer ✔The velocity and acceleration vectors are
perpendicular.
Shown below are the velocity and acceleration vectors for a person in several
different types of motion. In which case is the person slowing down and
turning to his right? - correct answer ✔Acceleration is diagonally up and to
the left, velocity is straight down.
While an object is in projectile motion (with upward being positive) with no air
resistance - correct answer ✔the horizontal component of its velocity
remains constant and the vertical component of its acceleration is equal to -g.
Alice and Tom dive from an overhang into the lake below. Tom simply drops
straight down from the edge, but Alice takes a running start and jumps with an
initial horizontal velocity of 25 m/s. Neither person experiences any significant
air resistance. Just as they reach the lake below - correct answer ✔the
speed of Alice is larger than that of Tom.
Point P in the figure indicates the position of an object traveling at constant
speed clockwise around the circle. Which arrow best represents the direction
of the acceleration of the object at point P? - correct answer ✔The
acceleration points towards the center of the circle.
An object is moving to the right, and experiencing a net force that is directed
to the right. The magnitude of the force is decreasing with time. The speed of
the object is - correct answer ✔increasing.
You swing a bat and hit a heavy box with a force of 1500 N. The force the box
exerts on the bat is - correct answer ✔exactly 1500 N whether or not the box
moves.
with complete solution 2025
Two objects are thrown from the top of a tall building and experience no
appreciable air resistance. One is thrown up, and the other is thrown down,
both with the same initial speed. What are their speeds when they hit the
street? - correct answer ✔They are traveling at the same speed.
Suppose that a car traveling to the west (the -x direction) begins to slow down
as it approaches a traffic light. Which statement concerning its acceleration in
the x direction is correct? - correct answer ✔Its acceleration is positive but its
velocity is negative.
For general projectile motion, when the projectile is at the highest point of its
trajectory - correct answer ✔its velocity is perpendicular to the acceleration.
Alice and Tom dive from an overhang into the lake below. Tom simply drops
straight down from the edge, but Alice takes a running start and jumps with an
initial horizontal velocity of 25 m/s. Neither person experiences any significant
air resistance. Compare the time it takes each of them to reach the lake
below. - correct answer ✔Alice and Tom will reach the surface of the lake at
the same time.
A pilot drops a package from a plane flying horizontally at a constant speed.
Neglecting air resistance, when the package hits the ground the horizontal
location of the plane will - correct answer ✔be over the package.
If an object travels at a constant speed in a circular path, the acceleration of
the object is - correct answer ✔larger in magnitude the smaller the radius of
the circle.
, An object moves in a circular path at a constant speed. What is the
relationship between the directions of the object's velocity and acceleration
vectors? - correct answer ✔The velocity and acceleration vectors are
perpendicular.
Shown below are the velocity and acceleration vectors for a person in several
different types of motion. In which case is the person slowing down and
turning to his right? - correct answer ✔Acceleration is diagonally up and to
the left, velocity is straight down.
While an object is in projectile motion (with upward being positive) with no air
resistance - correct answer ✔the horizontal component of its velocity
remains constant and the vertical component of its acceleration is equal to -g.
Alice and Tom dive from an overhang into the lake below. Tom simply drops
straight down from the edge, but Alice takes a running start and jumps with an
initial horizontal velocity of 25 m/s. Neither person experiences any significant
air resistance. Just as they reach the lake below - correct answer ✔the
speed of Alice is larger than that of Tom.
Point P in the figure indicates the position of an object traveling at constant
speed clockwise around the circle. Which arrow best represents the direction
of the acceleration of the object at point P? - correct answer ✔The
acceleration points towards the center of the circle.
An object is moving to the right, and experiencing a net force that is directed
to the right. The magnitude of the force is decreasing with time. The speed of
the object is - correct answer ✔increasing.
You swing a bat and hit a heavy box with a force of 1500 N. The force the box
exerts on the bat is - correct answer ✔exactly 1500 N whether or not the box
moves.
