Education Technology

# Activities

• ##### Subject Area

• Science: Physics: Kinematics
• Science: Physics: Work, Energy and Momentum

9-12

45 Minutes

• ##### Device
• TI-Nspire™
• TI-Nspire™ CAS
• ##### Software

TI-Nspire™
TI-Nspire™ CAS

1.7

## Collisions in One Dimension

#### Activity Overview

Students use the law of conservation of momentum to determine the momentums and velocities of objects involved in perfectly inelastic collisions.

#### Key Steps

• Students investigate the relationships between velocity, kinetic energy, and momentum during perfectly inelastic one-dimensional collisions.

First, students examine a simulation of one ice skater throwing a snowball to another. The first ice skater has an initial non-zero velocity, and the second ice skater is initially at rest.

• Next, students make a graph of the position of the snowball vs. time. They assume a scenario in which the first skater holds the snowball for four seconds before throwing it to the second skater.

• Finally, students calculate the kinetic energy of the snowball and the skaters before and after the throw. They use these calculations to describe the effects of inelastic collisions on kinetic energy.