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Physical Science 17-18 > Physics > Flashcards

Flashcards in Physics Deck (18)
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1
Q

Units

A

v: m/s
d: m
m: g
a: m/s^2
A: m^2
p: kgm/s
F:kg
m/s^2
t: sec
V:L
D:g/L

2
Q

Force

A

Action exerted on something to change its state of rest or motion

3
Q

Balanced Forces

A

Two or more forces act on object

Equal in size and magnitude

4
Q

Magnitude

A

Amount of force acting on a object

5
Q

Net Forces

A

Sum of all forces

Strongest one changes the object’s velocity

6
Q

Gravity

A

Weakest force
Act over large distances
Magnified by the mass of said object

7
Q

Electromagnetic Forces

A

Slightly stronger
Act over an Angstrom (Å)
Acts on charged particles and objects

8
Q

Weak Nuclear Forces

A

Stronger than EM forces
Holds electrons to their orbitals
Causes radioactive decay

9
Q

Strong Nuclear Forces

A

Strongest force
Breaking this force causes nuclear reactions (bombs)
Holds p+ and n together in the nucleus
Hella strong even over short distances

10
Q

Contact Forces

A

Two objects touch to exchange forces

11
Q

Field Forces

A

Act without touch

12
Q

Net Forces

A

Sum of all forces acting on an object

13
Q

Friction

A

Force that opposes motion

14
Q

Static Friction

A

Resists the initiation of sliding motion

- Not moving, and it won’t start

15
Q

Kinetic Friction

A

Opposes the movement of two surface

16
Q

First Law of Motion

A

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

17
Q

Second Law of Motion

A

Force= mass*acceleration

18
Q

Universal Law of Gravitation

A

All objects have mass, and thus can be acted on by gravity