PHY 111 STUDY SHEET 2026 UPDATED
QUESTIONS AND SOLUTIONS
◉ Examine the position vs. time graph below. What is the velocity of
the object at t = 5.0 s?
Answer: -5 m/s
◉ A student measures the mass of an object at 4.68 g and the
volume of the object at 2.3 mL. The student calculates the density as
2.03478 g/mL. A second student disagrees with the density. Which
of the following statements would explain why the second student
disagrees?
Answer: The number of decimals in the answer does not show
proper precision.
◉ Examine the position vs. time graph below. Which of the following
correctly describes the motion of the object?
Answer: Forwards at a constant speed and then backward at a
constant speed
◉ A car moving at a constant 25 m/s travels for 3.0 seconds. What is
the distance traveled by the car?
Answer: 75 m
,◉ A student measures the mass of an object at 4.68 g. Which of the
following statements is most accurate?
Answer: he first two digits are measured and the last digit is
estimated.
◉ A student models the constant speed motion of an object with the
following equation:
x = (4 m/s) t + (-15 m)
Which of the following descriptions of motion is consistent with this
equation?
Answer: The object starts at a negative position and travels
forwards.
◉ How much time will it take for an object traveling at a constant
speed of 20 m/s to travel 15 m?
Answer: 0.75 s
◉ A student models the constant speed motion of an object with the
following equation:
x = (-2 m/s) t + (4 m)
, Which of the following descriptions of motion is consistent with this
equation?
Answer: The object starts at a positive position and travels
backwards.
◉ Examine the velocity vs. time graph below. Which of the following
correctly describes the motion of the object?
Answer: Constant speed forwards and then constant speed
backward
◉ Convert 35.0 mph to m/s. (1 mi = 1.6 km)
Answer: 15.6 m/s
◉ Which of the following is a vector measurement?
Answer: Displacement
◉ Convert 4200 cm to miles. (1 mi = 1.6 km)
Answer: 0.026 mi
◉ A car travels forwards at a constant speed of 30 m/s for 5.0
seconds. How far will the car move in this time?
Answer: 150 m
QUESTIONS AND SOLUTIONS
◉ Examine the position vs. time graph below. What is the velocity of
the object at t = 5.0 s?
Answer: -5 m/s
◉ A student measures the mass of an object at 4.68 g and the
volume of the object at 2.3 mL. The student calculates the density as
2.03478 g/mL. A second student disagrees with the density. Which
of the following statements would explain why the second student
disagrees?
Answer: The number of decimals in the answer does not show
proper precision.
◉ Examine the position vs. time graph below. Which of the following
correctly describes the motion of the object?
Answer: Forwards at a constant speed and then backward at a
constant speed
◉ A car moving at a constant 25 m/s travels for 3.0 seconds. What is
the distance traveled by the car?
Answer: 75 m
,◉ A student measures the mass of an object at 4.68 g. Which of the
following statements is most accurate?
Answer: he first two digits are measured and the last digit is
estimated.
◉ A student models the constant speed motion of an object with the
following equation:
x = (4 m/s) t + (-15 m)
Which of the following descriptions of motion is consistent with this
equation?
Answer: The object starts at a negative position and travels
forwards.
◉ How much time will it take for an object traveling at a constant
speed of 20 m/s to travel 15 m?
Answer: 0.75 s
◉ A student models the constant speed motion of an object with the
following equation:
x = (-2 m/s) t + (4 m)
, Which of the following descriptions of motion is consistent with this
equation?
Answer: The object starts at a positive position and travels
backwards.
◉ Examine the velocity vs. time graph below. Which of the following
correctly describes the motion of the object?
Answer: Constant speed forwards and then constant speed
backward
◉ Convert 35.0 mph to m/s. (1 mi = 1.6 km)
Answer: 15.6 m/s
◉ Which of the following is a vector measurement?
Answer: Displacement
◉ Convert 4200 cm to miles. (1 mi = 1.6 km)
Answer: 0.026 mi
◉ A car travels forwards at a constant speed of 30 m/s for 5.0
seconds. How far will the car move in this time?
Answer: 150 m
