Education Technology

# Activities

• ##### Subject Area

• Science: Physical Science: Newton's Laws
• Science: Physics: Dynamics

6-8

60 Minutes

• ##### Device
• TI-83 Plus Family
• TI-84 Plus
• TI-84 Plus Silver Edition
• TI-84 Plus C Silver Edition
• TI-84 Plus CE
• TI-84 Plus CE Python
• ##### Software

TI Connect™
TI Connect™ CE

• ##### Accessories

CBR™/CBR 2™
TI Connectivity Cable

• ##### Other Materials
This is Activity 12 from the EXPLORATIONS Book:
Math and Science in Motion: Activities for Middle School.

The following material is required for this activity:
• Five large basket-style coffee filters

## Falling Down

#### Activity Overview

In this activity, students' will determine the average speed of a falling object. They will observe whether or not changing the mass and keeping the same shape have an effect on the average speed of the object.

#### Key Steps

• A height-time graph of one to six nested coffee fillters falling on a CBR2 is used to calculate the average speed of different masses that have the same air resistance.

• Students differentiate regions of the height-time graph that indicate accelerated motion with regions that indicate constant velocity.

• From their data table, students are to describe the relationship between the mass of a falling object and the average speed of descent.