Objectives
• describe the relationship between mass and weight
• observe the relationship between force and acceleration
• observe the relationship between force and mass
• predict the falling rate of balls of different masses

Vocabulary
acceleration  rate of change in speed and direction
mass  amount of matter in an object
Newton's 2nd Law  a greater unbalanced external force causes a greater acceleration of an object in the direction of the force. A greater unbalanced external force is required to accelerate an object with more mass. (Force = mass x acceleration)
gravity
mass
weight 
Watch Mr. Noyes do the experiment. 