Physics Flashcards
(18 cards)
Units
v: m/s
d: m
m: g
a: m/s^2
A: m^2
p: kgm/s
F:kgm/s^2
t: sec
V:L
D:g/L
Force
Action exerted on something to change its state of rest or motion
Balanced Forces
Two or more forces act on object
Equal in size and magnitude
Magnitude
Amount of force acting on a object
Net Forces
Sum of all forces
Strongest one changes the object’s velocity
Gravity
Weakest force
Act over large distances
Magnified by the mass of said object
Electromagnetic Forces
Slightly stronger
Act over an Angstrom (Å)
Acts on charged particles and objects
Weak Nuclear Forces
Stronger than EM forces
Holds electrons to their orbitals
Causes radioactive decay
Strong Nuclear Forces
Strongest force
Breaking this force causes nuclear reactions (bombs)
Holds p+ and n together in the nucleus
Hella strong even over short distances
Contact Forces
Two objects touch to exchange forces
Field Forces
Act without touch
Net Forces
Sum of all forces acting on an object
Friction
Force that opposes motion
Static Friction
Resists the initiation of sliding motion
- Not moving, and it won’t start
Kinetic Friction
Opposes the movement of two surface
First Law of Motion
Objects in motion stay in motion until acted on by a net force
Most basically, an object’s resistance to changing it’s motion
More mass= more resistance to changing motion
Inertia
Second Law of Motion
Force= mass*acceleration
Universal Law of Gravitation
All objects have mass, and thus can be acted on by gravity
