Download presentation

Presentation is loading. Please wait.

Published byBrianna Edwards Modified over 7 years ago

1
Which line represents the greater speed? Graphing motion The greater the speed, the steeper the slope

2
How did the object’s speed change with time? Stopped Velocity 3 Velocity 1 Velocity 2 What’s different about Velocity 2? The object is moving backward.

3
What happened at 4 s? The speed of the object changed

4
What is the average speed? Average speed = total distance/total time = 90 m/10 s = 9 m/s

5
What is the instantaneous speed at 2 s? Instantaneous speed = 5 m/2 s = 2.5 m/s

6
What is the instantaneous speed at 10 s? Instantaneous speed = 90 m/10 s = 9 m/s

7
How is the object moving? It is moving at a constant velocity.

8
How did the object’s motion change? Constant 4 m/s velocity until 4 s, then accelerated for 2 s and then constant 6 m/s velocity

9
What is the acceleration of the object? Acceleration = slope of line = rise/run = (6 - 4)/(8-4) = 0.5 m/s 2 rise run

10
How did the object’s motion change? Constant 8 m/s velocity, then decelerated for 6 s, then constant 2 m/s velocity.

11
What is the acceleration of the object? Acceleration = rise/run = (2-8)/(8-2) = -1 m/s 2 rise run Notice that a negative slope means the object is slowing down.

12
Calculating acceleration: a = v f - v i t 1. A stopped car accelerates to 30 m/s in 15 s. What is its acceleration? V f = 30 m/s v i = 0 m/s t = 15 s a = (30 - 0) = 2 m/s 2 15 2. A car moving at 45 m/s slows to 15 m/s in 5 s. What is its acceleration? V f = 15 m/s v i = 45 m/s t = 5 s a = (15 - 45) = -6 m/s 2 5

Similar presentations

© 2023 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google