1. Section 1

1.30. Explore 4

Mathematics 20-3 Module 3

Section 1: Slope—Physical Objects

 

Self-Check 2

 

The following diagram represents a ramp leading into a house. Movers will use the ramp to bring heavy boxes into the home.

This illustration shows a ramp going from a sidewalk to the top of two steps. The two steps are eighteen inches high.

  1. How does having a ramp provide safety for workers? Answer

  2. How does the number of steps affect the ramp’s grade? Answer

  3. If the height (rise) of the steps is 18 in and the horizontal (run) distance is 90 in, then the slope as a percent grade of the ramp is

    1. 500%

    2. 0.2%

    3. 20%

    Answer
Share 2

 

With a partner or with a group of people, discuss the following.

 

These are two photos showing wheelchairs in use. The right photo is of a wheelchair being pushed up a ramp, and the left one is of a wheelchair on a bus.

bus: Photodisc/Thinkstock; wheelchair ramp: iStockphoto/Thinkstock

 

Wheelchair accessibility requires ramps with specific slopes. The ramp slopes are measured in percent grade. Compare the photos.

  1. What problems do you see with the ramp on the right? Would someone in a wheelchair be able to use this ramp without help?

  2. The slope of the bus floor appears to be zero, so what is the purpose of the pink strap? 

course folder If required, save a copy of your discussion in your course folder.