INTRODUCTORY PHYSICS I - EXAM 1 | QUESTIONS
WITH VERIFIED ACCURATE ANSWERS | 2026
When is the average velocity of an object equal to the instantaneous velocity?
A) only when the velocity is increasing at a constant rate
B) only when the velocity is decreasing at a constant rate
C) when the velocity is constant
D) always
E) never - Answers - C) when the velocity is constant
You drive 6.0 km at 50 km/h and then another 6.0 km at 90 km/h. Your average speed
over the 12km drive will be
A) greater than 70 km/h.
B) equal to 70 km/h.
C) less than 70 km/h.
D) exactly 38 km/h. - Answers - C) less than 70 km/h.
Which of the following situations is impossible?
A) An object has velocity directed east and acceleration directed west.
B) An object has velocity directed east and acceleration directed east.
C) An object has zero velocity but non-zero acceleration.
D) An object has constant non-zero acceleration and changing velocity.
E) An object has constant non-zero velocity and changing acceleration. - Answers - E)
An object has constant non-zero velocity and changing acceleration.
If the acceleration of an object is zero, then that object cannot be moving.
A) True
B) False - Answers - B) False
Suppose that a car traveling to the west begins to slow down as it approaches a traffic
light. Which of the following statements about its acceleration is correct?
A) The acceleration is toward the east.
B) Since the car is slowing down, its acceleration must be negative.
C) The acceleration is zero.
D) The acceleration is toward the west. - Answers - A) The acceleration is toward the
east.
An object moving in the +x direction experiences an acceleration of +2.0 m/s2. This
means the object
A) travels 2.0 m in every second.
B) is traveling at 2.0 m/s.
C) is decreasing its velocity by 2.0 m/s every second.
D) is increasing its velocity by 2.0 m/s every second. - Answers - D) is increasing its
velocity by 2.0 m/s every second.
, Suppose that an object is moving with a constant velocity. Which statement concerning
its acceleration must be correct?
A) The acceleration is constantly increasing.
B) The acceleration is constantly decreasing.
C) The acceleration is a constant non-zero value.
D) The acceleration is equal to zero. - Answers - D) The acceleration is equal to zero.
If the velocity of an object is zero at one instant, what is true about the acceleration of
that object? (There could be more than one correct choice.)
A) The acceleration could be positive.
B) The acceleration could be negative.
C) The acceleration could be zero.
D) The acceleration must be zero. - Answers - A) The acceleration could be positive.
B) The acceleration could be negative.
C) The acceleration could be zero.
When a ball is thrown straight up with no air resistance, the acceleration at its highest
point
A) is upward
B) is downward
C) is zero
D) reverses from upward to downward
E) reverses from downward to upward - Answers - B) is downward
Suppose a ball is thrown straight up and experiences no appreciable air resistance.
What is its acceleration just before it reaches its highest point?
A) zero
B) slightly less than g
C) exactly g
D) slightly greater than g - Answers - C) exactly g
A 10-kg rock and 20-kg rock are dropped from the same height and experience no
significant air resistance. If it takes the 20-kg rock a time T to reach the ground, what
time will it take the 10-kg rock to reach the ground?
A) 4T
B) 2T
C) T
D) T/2
E) T/4 - Answers - C) T
Two objects are dropped from a bridge, an interval of 1.0 s apart. Air resistance is
negligible. During the time that both objects continue to fall, their separation
A) increases.
B) decreases.
C) stays constant.
WITH VERIFIED ACCURATE ANSWERS | 2026
When is the average velocity of an object equal to the instantaneous velocity?
A) only when the velocity is increasing at a constant rate
B) only when the velocity is decreasing at a constant rate
C) when the velocity is constant
D) always
E) never - Answers - C) when the velocity is constant
You drive 6.0 km at 50 km/h and then another 6.0 km at 90 km/h. Your average speed
over the 12km drive will be
A) greater than 70 km/h.
B) equal to 70 km/h.
C) less than 70 km/h.
D) exactly 38 km/h. - Answers - C) less than 70 km/h.
Which of the following situations is impossible?
A) An object has velocity directed east and acceleration directed west.
B) An object has velocity directed east and acceleration directed east.
C) An object has zero velocity but non-zero acceleration.
D) An object has constant non-zero acceleration and changing velocity.
E) An object has constant non-zero velocity and changing acceleration. - Answers - E)
An object has constant non-zero velocity and changing acceleration.
If the acceleration of an object is zero, then that object cannot be moving.
A) True
B) False - Answers - B) False
Suppose that a car traveling to the west begins to slow down as it approaches a traffic
light. Which of the following statements about its acceleration is correct?
A) The acceleration is toward the east.
B) Since the car is slowing down, its acceleration must be negative.
C) The acceleration is zero.
D) The acceleration is toward the west. - Answers - A) The acceleration is toward the
east.
An object moving in the +x direction experiences an acceleration of +2.0 m/s2. This
means the object
A) travels 2.0 m in every second.
B) is traveling at 2.0 m/s.
C) is decreasing its velocity by 2.0 m/s every second.
D) is increasing its velocity by 2.0 m/s every second. - Answers - D) is increasing its
velocity by 2.0 m/s every second.
, Suppose that an object is moving with a constant velocity. Which statement concerning
its acceleration must be correct?
A) The acceleration is constantly increasing.
B) The acceleration is constantly decreasing.
C) The acceleration is a constant non-zero value.
D) The acceleration is equal to zero. - Answers - D) The acceleration is equal to zero.
If the velocity of an object is zero at one instant, what is true about the acceleration of
that object? (There could be more than one correct choice.)
A) The acceleration could be positive.
B) The acceleration could be negative.
C) The acceleration could be zero.
D) The acceleration must be zero. - Answers - A) The acceleration could be positive.
B) The acceleration could be negative.
C) The acceleration could be zero.
When a ball is thrown straight up with no air resistance, the acceleration at its highest
point
A) is upward
B) is downward
C) is zero
D) reverses from upward to downward
E) reverses from downward to upward - Answers - B) is downward
Suppose a ball is thrown straight up and experiences no appreciable air resistance.
What is its acceleration just before it reaches its highest point?
A) zero
B) slightly less than g
C) exactly g
D) slightly greater than g - Answers - C) exactly g
A 10-kg rock and 20-kg rock are dropped from the same height and experience no
significant air resistance. If it takes the 20-kg rock a time T to reach the ground, what
time will it take the 10-kg rock to reach the ground?
A) 4T
B) 2T
C) T
D) T/2
E) T/4 - Answers - C) T
Two objects are dropped from a bridge, an interval of 1.0 s apart. Air resistance is
negligible. During the time that both objects continue to fall, their separation
A) increases.
B) decreases.
C) stays constant.
