Phy103 Midterm Study Guide Questions
With Complete Solutions
When you complete one lap around a track, your displacement is
zero because your end position is the same as your start position.
correct answer: True
Two students leave their dorm room together. After walking a
while, one realizes she forgot her book and returns to get it. The
other student waits for her. Once the forgetful student returns to
her roommate, which one has the greater displacement? correct
answer: Neither, their displacements are equal.
Think about getting from home to campus (by car, bike,
walking, etc.). You have to slow down or even stop some times
and speed up at others. Which of the following statements is true
about your trip? correct answer: While the instantaneous speed
can have many values, the average speed is set by the distance
covered divided by the time for travel.
The average velocity of an object that completes a round-trip
correct answer: is zero.
An object moving in the positive x direction has a speed that is
increasing. The object has a negative acceleration. correct
answer: False
, Two cars start moving from rest. Car A has twice the
acceleration of car B. After a fixed amount of time, correct
answer: car A has moved twice as far as car B.
An object with a negative velocity undergoes a negative
acceleration. What happens to the object? correct answer: Its
velocity becomes more and more negative.
An object moving in the positive x direction has a speed that is
decreasing. The object has a negative acceleration. correct
answer: True
You back your car down the driveway, but realize you forgot
something in your house and go back up the driveway. Which of
the following best describes your average acceleration? correct
answer: The average acceleration is zero.
Two cars start moving from rest. Car A and car B have the same
acceleration, but car B accelerates for twice as long as car A.
Which of the following is true? correct answer: Car B will have
covered a distance 4 times larger than car A.
If a stone is thrown vertically upwards and air resistance is
negligible, the stone's acceleration correct answer: is always
directed vertically downward.
The Moon is in free-fall. correct answer: True
The International Space Station is typically in free-fall. correct
answer: True
With Complete Solutions
When you complete one lap around a track, your displacement is
zero because your end position is the same as your start position.
correct answer: True
Two students leave their dorm room together. After walking a
while, one realizes she forgot her book and returns to get it. The
other student waits for her. Once the forgetful student returns to
her roommate, which one has the greater displacement? correct
answer: Neither, their displacements are equal.
Think about getting from home to campus (by car, bike,
walking, etc.). You have to slow down or even stop some times
and speed up at others. Which of the following statements is true
about your trip? correct answer: While the instantaneous speed
can have many values, the average speed is set by the distance
covered divided by the time for travel.
The average velocity of an object that completes a round-trip
correct answer: is zero.
An object moving in the positive x direction has a speed that is
increasing. The object has a negative acceleration. correct
answer: False
, Two cars start moving from rest. Car A has twice the
acceleration of car B. After a fixed amount of time, correct
answer: car A has moved twice as far as car B.
An object with a negative velocity undergoes a negative
acceleration. What happens to the object? correct answer: Its
velocity becomes more and more negative.
An object moving in the positive x direction has a speed that is
decreasing. The object has a negative acceleration. correct
answer: True
You back your car down the driveway, but realize you forgot
something in your house and go back up the driveway. Which of
the following best describes your average acceleration? correct
answer: The average acceleration is zero.
Two cars start moving from rest. Car A and car B have the same
acceleration, but car B accelerates for twice as long as car A.
Which of the following is true? correct answer: Car B will have
covered a distance 4 times larger than car A.
If a stone is thrown vertically upwards and air resistance is
negligible, the stone's acceleration correct answer: is always
directed vertically downward.
The Moon is in free-fall. correct answer: True
The International Space Station is typically in free-fall. correct
answer: True
