Calculating Speed from Distance/Time Graphs

In this video, Miss Brown teaches 8th-grade students how to calculate speed using distance-time graphs. She explains the speed formula, distance divided by time, and demonstrates how to extract distance and time from graphs to calculate speed. The video includes examples with lines starting at zero and those requiring subtraction. Miss Brown also covers calculating speed for specific graph segments and discusses the importance of clear labeling on graphs.

What is the formula for calculating speed?

• Distance plus time

• Speed multiplied by time

• Distance divided by time

• Time divided by distance

Tags

NGSS.MS-PS3-1

How do you find the distance on a distance-time graph?

• By looking at the slope of the line

• By looking at the area under the curve

• By looking at the y-axis

• By looking at the x-axis

If a bicycle travels 30 kilometers in 5 hours, what is its average speed?

• 6 kilometers per hour

• 5 kilometers per hour

• 7 kilometers per hour

• 8 kilometers per hour

What is the speed of an aircraft that travels 3000 kilometers in 3 hours?

• 1000 kilometers per hour

• 1500 kilometers per hour

• 500 kilometers per hour

• 2000 kilometers per hour

Tags

NGSS.MS-PS3-1

How do you calculate speed when the distance does not start at zero?

• By adding the starting distance to the ending distance

• By subtracting the starting distance from the ending distance

• By multiplying the starting distance by the ending distance

• By dividing the starting distance by the ending distance

What is the speed of a zebra that travels 33 meters in 32 seconds?

• 2.0 meters per second

• 0.5 meters per second

• 1.0 meters per second

• 1.5 meters per second

Tags

NGSS.MS-PS3-1

How do you find the initial speed of a bike before it changes speed?

• By looking at the steepest part of the graph

• By calculating the speed from the end to the first change

• By looking at the flattest part of the graph

• By calculating the speed from the start to the first change

Tags

NGSS.MS-PS3-1

What is the speed of a car that travels 80 kilometers in 1 hour?

• 40 kilometers per hour

• 60 kilometers per hour

• 80 kilometers per hour

• 100 kilometers per hour

Tags

NGSS.MS-PS3-1

If a bus travels from 20 meters to 60 meters in 10 seconds, what is its speed?

• 5 meters per second

• 4 meters per second

• 3 meters per second

• 2 meters per second

What does a steeper line on a distance-time graph indicate?

• No movement

• Faster speed

• Constant speed

• Slower speed