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Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
1.
Which distance can be most accurately measured with a ruler?(1 point)
- (0 pts) the length of a river
- (1 pt) the width of a book
- (0 pts) the distance between two cities
- (0 pts) the size of an object under a microscope
2.
A person drives north 3 blocks, then turns east and drives 3 blocks. The driver then turns south and drives 3 blocks. How could the driver have made the distance shorter while maintaining the same displacement?(1 point)
- (1 pt) by driving east 3 blocks from the starting point.
- (0 pts) by driving north 1 block and east 4 blocks.
- (0 pts) by driving west 3 blocks from the starting point.
- (0 pts) by driving back to the starting point by the same route.
3.
Displacement vectors of 1 km south, 3 km north, 6 km south, and 2 km north combine to a total displacement of(1 point)
- (0 pts) 12 km
- (0 pts) 6 km
- (0 pts) 4 km
- (1 pt) 2 km
4.
Instantaneous speed is measured(1 point)
- (0 pts) at the starting point.
- (0 pts) when the object reaches its destination.
- (1 pt) at a particular instant.
- (0 pts) over the duration of the trip.
5.
A car traveled 88 km in 1 hour, 90 km in the next 2 hours, and then 76 km in 1 hour before reaching its destination. What was the car's average speed?(1 point)
- (0 pts) 254 km/h
- (1 pt) 63.5 km/h
- (0 pts) 209 km/h
- (0 pts) 74.5 km/h
6.
A horizontal line on a distance-time graph means the object is(1 point)
- (0 pts) moving at a constant speed.
- (0 pts) moving faster.
- (0 pts) slowing down.
- (1 pt) at rest.
7.
A distance-time graph indicates that an object moves 100 m in 4 s and then remains at rest for 1 s. What is the average speed of the object?(1 point)
- (0 pts) 50 m/s
- (0 pts) 25 m/s
- (1 pt) 20 m/s
- (0 pts) 100 m/s
8.
What example identifies a change in motion that produces acceleration?(1 point)
- (0 pts) a speed skater moving at a constant speed on a straight track
- (1 pt) a ball moving at a constant speed around a circular track
- (0 pts) a particle moving in a vacuum at constant velocity
- (0 pts) a vehicle moving down the street at a steady speed
9.
Objects in free fall near the surface of the Earth experience(1 point)
- (0 pts) constant speed.
- (0 pts) constant velocity.
- (1 pt) constant acceleration.
- (0 pts) constant distance.
10.
The slope of a speed-time graph indicates(1 point)
- (0 pts) direction.
- (1 pt) acceleration.
- (0 pts) velocity.
- (0 pts) speed.
Completion
Complete each sentence or statement.
11.
The motion of an object looks different to observers in different _____________.(1 point)(1 pt) frames of reference
(1 pt) perspectives
(1 pt) speed
(1 pt) frames of references
(1 pt) frame of references
(1 pt) frame
(0 pts) perspective
0 /1 point
12.
The direction and length of a straight line from the starting point to the ending point of an object's motion is _____________.(1 point)(1 pt) displacement
1 /1 point
13.
The difference between speed and velocity is that velocity indicates the _____________ of motion and speed does not.(1 point)(1 pt) direction
1 /1 point
Short Answer
14.
Bus A travels 300 m in 12 s. Bus B travels 200 m in 12 s. Both vehicles travel at constant speed. How do the distance-time graphs for these two speeds differ?(3 points)Essay:
bus A was going 25m/s bus B was going 16m/s1 /3 points
15.
What is the significance of the slope in a distance-time graph? (3 points)Essay:
to show acceleration3 /3 points
16.
What types of changes in motion cause acceleration?(3 points)Essay:
change in position3 /3 points
Problem
17.
If you ride your bike at an average speed of 2 km/h and need to travel a total distance of 20 km, how long will it take you to reach your destination? Show your work.(3 points)Essay:
20 / 2 = 10h3 /3 points
Essay
18.
Picture a ball traveling at a constant speed around the inside of a circular structure. Is the ball accelerating? Explain your answer.(5 points)Essay:
no because its going a constant speed5 /5 points
Other
19.
Calculating Using vector addition, calculate the distance traveled by the object and the displacement of the object represented by the figure.
(5 points)Essay:
a displacment is 11 meters, B displacement is 5 meters distance traveled is the same5 /5 points
The final score is 31/35 (88.6%).
What else can I help you with?
What is the difference between instantaneous speed and speed?
Instantaneous speed is the speed of an object at a specific moment in time, while speed refers to the average rate at which an object covers distance over a period of time. Instantaneous speed gives the speed at a precise instant, whereas speed provides an overall measure of how fast an object is moving.
What is speed measured in an infinitely small time interval?
Speed measured in an infinitely small time interval is known as instantaneous speed. This is the speed at a specific moment in time, as opposed to average speed which considers the total distance traveled over a given time period.
What is called speed of an object at a given instant?
An objects speed at any particular moment in time is known as its instantaneous velocity. This is the rate of change or the derivative of the objects position.
Speed measured in an infinately small time interval?
Instantaneous speed refers to the speed of an object at a specific moment in time, often calculated by determining the object's position within an infinitely small time interval. This speed provides information about the object's velocity at that exact instance, helping to understand its motion more accurately.
What is a sentence for instantaneous speed?
Instantaneous speed is, essentially, instant speed. An example sentence would be: The Camaro's instantaneous speed surprised most of the watchers.
Instantaneous speed is measured how?
Instantaneous speed cannot be measured because it is a theoretical construct. It is the speed that an object has at one particular moment, but measuring the speed of an object necessarily involves several moments so you can only measure the speed over some finite amount of time.
Slope of a displacement time graph?
It is the instantaneous speed in the direction in which the displacement is measured.
What is the difference between instantaneous speed and speed?
Instantaneous speed is the speed of an object at a specific moment in time, while speed refers to the average rate at which an object covers distance over a period of time. Instantaneous speed gives the speed at a precise instant, whereas speed provides an overall measure of how fast an object is moving.
What can speed be measured by?
it can be measured by distance covered and time taken. Speedometer is a device to measure the speed Average Speed = total distance/ total time; speedometers use other correlates to estimate instantaneous speed.
How does a car average speed differ from its instantaneous apeed?
The average speed of a car is how fast it averages over a span of time. Instantaneous speed is how fast the car is moving at any given time which is measured using a real-time speedometer.
How does a car's average speed differ it's instantaneous speed?
The average speed of a car is how fast it averages over a span of time. Instantaneous speed is how fast the car is moving at any given time which is measured using a real-time speedometer.
Is instantaneous speed final speed?
No instantaneous speed is not final speed.
How is instantaneous speed different from average?
The average speed is the speed that it takes to travel a certain distance in a certain time. Average speed is determined by dividing the distance traveled by the time taken to get there. Instantaneous speed is a certain speed at any given time.
Does the speedometer of a car read average speed or instantaneous speed?
instantaneous speed
What is speed measured in an infinitely small time interval?
Speed measured in an infinitely small time interval is known as instantaneous speed. This is the speed at a specific moment in time, as opposed to average speed which considers the total distance traveled over a given time period.
An objects speed at a particular moment in time is called?
Instantaneous Speed.
What is called speed of an object at a given instant?
An objects speed at any particular moment in time is known as its instantaneous velocity. This is the rate of change or the derivative of the objects position.
