Unit 2 - Gravity and Friction Flashcards
1
Q
gravity
A
a force of attraction between objects due to their masses
2
Q
mass
A
amount of matter in an object
3
Q
weight
A
a measure of the pull of gravity on that mass
4
Q
friction
A
a contact force that resists motion between two objects
5
Q
air resistance
A
friction between a moving object and the air around the object
6
Q
density
A
number of air molecules in a given volume
7
Q
gravitational force
A
pull of objects toward earth
8
Q
orbit
A
curved path that objects take around a star, planet, moon
9
Q
common unit for mass in the metric system
A
grams or kilograms
10
Q
measure force with
A
newtons
