S3- Chap 3 Dynamics I: Mass and Weight Flashcards
What is a force
A force can be thought of as a push or a pull due to interaction between objects to explain changes in motion.
What are the 2 types of forces
-non-contact forces
-contact forces
What are non-contact forces
-gravitational force
-electrostatic force
-magnetic force
what are contact forces
-friction
-air resistance
-normal force
-tension
what is mass
mass is a measure of the amount of matter in a body
what is mass SI unit
Kilogram (kg)
what is weight
weight is the gravitational force acting on an object that has mass
what is gravitational field
a gravitational field is a region in which mass experiences a force due to gravitational attraction.
what is gravitational field strength
gravitational field strength (g) is defined as the gravitational force per unit mass placed at that point.
Formula for weight
W = m x g
formula for force
F = m x a
weight SI unit
N (newton)
