Question Video: Identifying the Greatest Speed on a Speed-Time Graph | Nagwa Question Video: Identifying the Greatest Speed on a Speed-Time Graph | Nagwa

# Question Video: Identifying the Greatest Speed on a Speed-Time Graph Science • Third Year of Preparatory School

## Join Nagwa Classes

Which color line shows the object that has the greatest speed?

01:21

### Video Transcript

Which color line shows the object that has the greatest speed?

Here, we’ve been given a speed–time graph that shows the motion of three different objects using three lines, one red, blue, and orange. We wanna figure out which line shows the object with the greatest speed. Let’s begin by taking a closer look at the graph. We can see that the vertical axis shows the speed at which the objects travel, and the horizontal axis shows the time that the objects are traveling for. Notice that all three of the lines on the graph are horizontal. So each one remains fixed at a certain value of speed as time goes on. This tells us that the objects represented by the red, blue, and orange lines all move at constant speeds. But this does not mean that they all move at the same speed.

In fact, we know that each object moves at a different speed, since each line has a different value on the vertical or speed axis. We wanna know which line shows the greatest speed. So that’s whatever line has the greatest value on the speed axis. We can see that the red line is higher up along this axis than both the blue line and the orange line, so we have our answer. On this speed–time graph, the color of the line that shows the object with the greatest speed is red.

## Join Nagwa Classes

Attend live sessions on Nagwa Classes to boost your learning with guidance and advice from an expert teacher!

• Interactive Sessions
• Chat & Messaging
• Realistic Exam Questions