RIO SOLADO - PHY 111 MIDTERM 1
CORRECT 100%
A student moves 8.0 m to the west, 6.0 m to the north, and 10.0 m to the east. What is
the magnitude of the displacement? - ANSWER 6.3 m
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
Examine the velocity vs. time graph below. What is the total distance? - ANSWER 8 m
Examine the velocity vs. time graph below. What direction is the object moving at t = 4.0
s? - ANSWER Backwards
A student wants to compare a set of measurements in order to analyze the precision of
an instrument. Which of the following methods would be most appropriate? - ANSWER
Examine the percent difference between the largest and smallest measured values
How much time will it take for a car traveling at a velocity of -4.0 m/s to travel a distance
of 30 m? - ANSWER 7.5 m
A jogger starts at a position of 4.0 m and moves forwards at a constant rate ending at a
position of 12.0 m at a time 4.0 s later. What is the speed of the jogger? - ANSWER 2.0
m/s
A student moves 3.0 m south, 6.0 m east, and 1.0 m north. What is the angle of the
displacement? - ANSWER -18°
The grid below shows two vectors <strong>A</strong> and <strong>B</strong>. What
is the magnitude of the sum of the vectors <srong>A</strong>+<strong>B</strong>? -
ANSWER 5.7
A student launches a rocket with some initial velocity v at some angle θ. The rocket hits
a wall on its way back down to the ground. (See the diagram below.) Which of the
following statements is most accurate? - ANSWER The speed of the rocket just before
it hits the wall is less than the starting speed of the rocket.
Suppose that an airplane flying 70 m/s at a height of 300 m drops a crate. What
horizontal distance will the crate have traveled when it hits the ground? Assume
negligible air resistance. - ANSWER 548 m
CORRECT 100%
A student moves 8.0 m to the west, 6.0 m to the north, and 10.0 m to the east. What is
the magnitude of the displacement? - ANSWER 6.3 m
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
Examine the velocity vs. time graph below. What is the total distance? - ANSWER 8 m
Examine the velocity vs. time graph below. What direction is the object moving at t = 4.0
s? - ANSWER Backwards
A student wants to compare a set of measurements in order to analyze the precision of
an instrument. Which of the following methods would be most appropriate? - ANSWER
Examine the percent difference between the largest and smallest measured values
How much time will it take for a car traveling at a velocity of -4.0 m/s to travel a distance
of 30 m? - ANSWER 7.5 m
A jogger starts at a position of 4.0 m and moves forwards at a constant rate ending at a
position of 12.0 m at a time 4.0 s later. What is the speed of the jogger? - ANSWER 2.0
m/s
A student moves 3.0 m south, 6.0 m east, and 1.0 m north. What is the angle of the
displacement? - ANSWER -18°
The grid below shows two vectors <strong>A</strong> and <strong>B</strong>. What
is the magnitude of the sum of the vectors <srong>A</strong>+<strong>B</strong>? -
ANSWER 5.7
A student launches a rocket with some initial velocity v at some angle θ. The rocket hits
a wall on its way back down to the ground. (See the diagram below.) Which of the
following statements is most accurate? - ANSWER The speed of the rocket just before
it hits the wall is less than the starting speed of the rocket.
Suppose that an airplane flying 70 m/s at a height of 300 m drops a crate. What
horizontal distance will the crate have traveled when it hits the ground? Assume
negligible air resistance. - ANSWER 548 m
