Download presentation

Presentation is loading. Please wait.

Published byShanon Tate Modified over 2 years ago

1
Introduction to Distance-Rate-Time The following is designed to help you understand the basics of one of the popular application problems in introductory algebra: rate of a canoe on a river. Example 1: Sam can paddle his canoe on a lake at 4 miles per hour. What will his rate be when he rows his canoe: a) up a river, against a current of 2 mph? b) down a river, with a current of 2 mph? Here is Sam rowing 4 mph on the lake:

2
. (double click on arrow to advance)

3
When Sam gets to the river and paddles upstream, the current is working against him, and as a result he will move at a slower pace. Think of his rate as the rate of a person walking along the bank keeping pace with the canoe. Here is Sam paddling upstream:

4
. (double click on arrow to advance)

5
When Sam paddles upstream, his rate is: Sam’s rate going upstream is 2 mph. Someone walking on the bank at 2 mph would stay right with the canoe.

6
Again, think of his rate as the rate of a person walking along the bank keeping pace with the canoe. Here is Sam paddling downstream: When Sam paddles downstream, the current is helping him, and as a result he will move at a faster pace.

7
. (double click on arrow to advance)

8
When Sam paddles downstream, his rate is: Sam’s rate going downstream is 6 mph. Someone walking on the bank at 6 mph would stay right with the canoe.

9
Example 2: Mary’s motorboat can go x miles per hour on a lake. What will her rate be when she takes her boat: a) up a river, against a current of y mph? b) down a river, with a current of y mph?

10
a) Up river: Going up river, Mary’s boat can go x – y mph. b) Down river: Going down river, Mary’s boat can go x + y mph.

Similar presentations

OK

11.2 Speed and Velocity Slow versus fast movement can be described in terms of ___________ The speed of an in-line skater is usually described in ________.

11.2 Speed and Velocity Slow versus fast movement can be described in terms of ___________ The speed of an in-line skater is usually described in ________.

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on deccan plateau of india Ppt on the road not taken summary Ppt on power line carrier communication download Ppt on traction rolling stock trading Convert doc file to ppt online shopping Ppt on event handling in javascript how do you make text Ppt on number system for class 9 cbse Ppt on census 2001 kerala Ppt on video teleconferencing centers Ppt on wireless power transmission system