Assignment 18 

Projectile motion and properties of vectors and conservation of energy are considered.

The Introductory Problem Set assignment is focused on analysis of projectile motion, especially in cases where the initial vertical velocity is not zero.

The qa is designed to reinforce the basic properties of vectors and their application.

The 'seed' problem is concerned with a ball dropped from rest in a moving vehicle, as it is observed from within the vehicle and also by an observer stationary with respect to the road.

The lab exercise tests energy conservation in a situation where a block is accelerated by a rubber band.

The text assignment continues the topic of conservation of energy.