Question

speed as a function of time use the graph of speed versus time to answer the questions about acceleration. which of the cars is speeding up? which of the cars is slowing down? which of the cars is maintaining a constant speed?

Explanation:

Step1: Analyze Car A

Car A's speed - time graph is a line with a positive slope. As time increases, the speed of car A is increasing (from 4 m/s to 7 m/s). So, when the speed of an object is increasing with time, the object is speeding up.

Step2: Analyze Car B

Car B's speed - time graph is a horizontal line. This means that the speed of car B does not change with time. So, car B is maintaining a constant speed.

Step3: Analyze Car C

Car C's speed - time graph is a line with a negative slope. As time increases, the speed of car C is decreasing (from 4 m/s to 0 m/s). So, when the speed of an object is decreasing with time, the object is slowing down.

Answer:

• Which of the cars is speeding up? Car A
• Which of the cars is slowing down? Car C
• Which of the cars is maintaining a constant speed? Car B