If after 2.0s, if the velocity changed from +3.0 m/s to -3.0m/s. what is the balls average speed in the first 2.5s?

This image has been Flagged as inappropriate Click to unflag
Image (1 of 1)

Expert Answers

An illustration of the letter 'A' in a speech bubbles

The average speed in the first 2.5 s can be calculated by dividing the distance traveled during this time by the time, 2.5 s.

The distance traveled can be found as an area under the graph. For the first 2 seconds, the speed is 2 m/s, so the distance traveled in the first 2 seconds is 2m/s * 2 = 4 m.

If after the 2 s the velocity changes to - 3 m/s, that means the ball is now traveling in the opposite direction with the speed 3 m/s. The distance covered in 0.5 s is 3 m/s * 0.5s = 1.5 m.

The total distance traveled is

4 m + 1.5 m = 5.5 m

So the average speed will be 5.5 m / 2.5 s = 2.2 m/s

Approved by eNotes Editorial Team

We’ll help your grades soar

Start your 48-hour free trial and unlock all the summaries, Q&A, and analyses you need to get better grades now.

  • 30,000+ book summaries
  • 20% study tools discount
  • Ad-free content
  • PDF downloads
  • 300,000+ answers
  • 5-star customer support
Start your 48-Hour Free Trial