Dynamics Introductory Activity
-> Mr. Stanbrough ->
Physics -> Mechanics
-> Newton's Laws ->
Newton's First Law -> this page
This activity is designed to reveal your preconceptions about the
causes of motion.
Discuss the following situations with the other members of your
group. Try to come up with specific and complete
answers. ("Gravity", for instance, is not a
complete answer.) Each individual in the group should record their
- Situation: A book is lying at rest on a table. Why?
In other words, what causes the book (or any object) to remain at
- Situation: The Voyager spacecraft is moving out of
the Solar System in a straight line with constant speed. Why is it
doing that? What causes an object to move with constant
- Situation: A pencil rolls off the desk and falls to
the floor. Why does it move the way it does? We know a lot about
this motion (free fall) - but what causes it to happen? Why do
- Situation: A book sliding across a table gradually
comes to a stop. Why? What causes a moving object to gradually
come to a stop?
last update March 1, 1999 by JL Stanbrough (firstname.lastname@example.org)