Force - Any push or pull on an object
Dynamics - Study of forces that cause objects or systems to move.
Mass - A measure of the amount of stuff in an object. The more mass an object has, the more it is resistant to a change in its motion. An object's resistance to change in motion is called inertia and this inertia is directly proportional to an object's mass.
Newton's First Law of Motion
A body at rest remains at rest, or, if in motion will, remains in motion at a constant velocity unless acted on by an external force.
The acceleration of a system is directly proportional to and in the same direction sat the net external force acting on a system, and inversely proportional to its mass.
Fnet = ma
Units of force: 1 Newton is the force necessary to to acceleration 1kg at a rate of 1 m/s/s.
1N = 1kg m/s/s
Weight is a force where g is the acceleration due to gravity.
w = mg
The weight of a 1 kg object is :
w = 1kg x 9.8 m/s/s = 9.8N
Pick up a paper copy and review the list of "contact" and "at a distance forces". Pick up a paper copy and review the list of forces.
Free Body Diagrams
Pick up a copy of this document on free body diagrams and answer it's question. When done, review your answers here.
Read pages 127 - 136 , sections 4.1, 4.2, 4.3 in the textbook
1,2,3 , 5 on page 161 in the textbook. Review your answers here.