AP Physics: Measurement and Motion Quiz Flashcards
A lab table measures 2.2 m. Convert this to centimeters
220 cm
A lab table measures 132.04 cm. Convert this to meters
1.3204
A vector remains unchanged
only if it is moved parallel to its original direction.
Lindsey measured the mass of her pencil to be 5.30 g. How many significant figures are in her measurement?
3
A lab table measures 1.76 m. Convert this to centimeters.
176
A car traveling at the legal speed limit has velocity -vcar with respect to the road. You are in another car traveling in the opposite direction at the legal speed limit with respect to the road. As the first car approaches you, what is its velocity relative to you?
-2vcar
A river is flowing at 4.8 m/s. A boy in a tube is floating the river downstream. If the boy can use his arms to paddle at 1.6 m/s with the current, how fast will it appear he is moving to anyone on the riverbank?
6.4
Sammie is running through the airport to catch her flight. If Sammie can run at 1.2 m/s and she runs on the moving sidewalk which moves at 7.2 m/s in the same direction, how fast would the airport security officers need to maintain pace with Sammie?
8.4
You are standing in a moving bus, facing forward, and you suddenly fall backward. You can imply from this that the bus’s
velocity increased
In a circus parade, a clown standing on a float moving at a constant forward speed drops a fake dumbbell. A child in the bleachers on the sidewalk observes the dumbbell. Ignore air resistance. If the float has a velocity of +vfloat with respect to the ground, what is the velocity of the clown as observed by the child?
+vfloat
Sammie is running through the airport to catch her flight. If Sammie can run at 1.4 m/s and she runs on the moving sidewalk which moves at 3.5 m/s in the same direction, how fast would the airport security officers need to maintain pace with Sammie?
4.9
In a diagram, the length of a vector arrow represents the
magnitude of the vector
A river is flowing at 8.9 m/s. A boy in a tube is floating the river downstream. If the boy can use his arms to paddle at 1.7 m/s with the current, how fast will it appear he is moving to anyone on the riverbank?
10.6
An airplane travels due west from NY to CA. If the engine of the plane can travel at 591 mph and the jet stream is moving at 32 mph against the plane, how fast (in mph) will the shadow of the plane move across the ground?
559
Melissa masses an object and records her data as 0.02360 kg. How many significant digits are in her measurement?
4
A cell phone measures 3.708 kg. Convert this to grams.
3,708
The velocity of a passenger relative to a boat is -vpb. The velocity of the boat relative to the river it is moving on is +vbr. The velocity of the river to the shore is +vrs. What is the velocity of the passenger relative to the shore? Assume the + direction is east for all observers.
-vpb + vbr + vrs
The resultant of two vectors is the smallest when the angle between them is ____° . The resultant is largest when the angle between them is ____° .
180, 0
In a circus parade, a clown standing on a float moving at a constant forward speed drops a fake dumbbell. A child in the bleachers on the sidewalk observes the dumbbell. Ignore air resistance. The dumbbell’s motion as described by an acrobat walking in the parade is very similar to the clown’s description of the dumbbell’s motion. What do you know about the motion of the acrobat?
both statements are true:
-the acrobat is at rest with respect to the float
-the acrobat is at rest with respect to the clown
A car traveling at the legal speed limit has velocity +vcar with respect to the road. You are in another car traveling in the opposite direction at the legal speed limit with respect to the road. As the first car approaches you, what is its velocity relative to you?
+2vcar
Lindsey measured the mass of her pencil to be 5.30 g. How many significant figures are in her measurement?
3
In a circus parade, a clown standing on a float moving at a constant forward speed drops a fake dumbbell. A child in the bleachers on the sidewalk observes the dumbbell. Ignore air resistance. The clown and the child would agree about which of the following observations? (Select all that apply.)
-the time interval for the dumbbell to fall
-the vertical distance the dumbbell falls
-the initial vertical velocity of the dumbbell
Which of the following is a frame of reference for measuring motion?
coordinate system
Scalar or Vector? Time
scalar
Scalar or Vector? Mass
scalar
Scalar or Vector? Velocity
vector
Scalar or Vector? Speed
scalar
Scalar or Vector? Distance
scalar
Scalar or Vector? Displacement
vector
Scalar or Vector? Position
vector
Scalar or Vector? Acceleration
vector
Scalar or Vector? Temperature
scalar
Which of the following situations represents a positive displacement of a carton? Assume positive position is measured vertically upward along a y-axis.
When the elevator doors open, the delivery person lifts the dolly over the threshold of the elevator.
When is the average velocity of an object equal to the instantaneous velocity?
This is the case only when the velocity is constant.
What is the unit for velocity from this graph?
m/s
In a position-time graph, what does the slope of the graph measure?
velocity of the object
What is the unit for velocity from this graph?
m/s
Mr. Dupree is riding a go cart at an average velocity of 22.3 m/s. Assuming the course takes longer than 1 min to complete, what distance, in meters, does Mr. Dupree travel from 9 sec to 24 sec?
334.5
A paper rocket having a mass of 16.2 grams is shot horizontally and travels 7.3 meters in 2.2 sec. What is the average velocity of the rocket?
3.32
In the graph, what is Joe’s average velocity from 30s to 55s?
0
The graph below shows the motion of a dog pacing along a fence. What is the dog’s average velocity from 4.0 s to 8.0 s?
0
In the graph shown, what is the average velocity from t = 1.0 s to 3.0 s?
15
