Physics

Question 1

Units

Answer 1

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

Question 2

Force

Answer 2

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

Question 3

Balanced Forces

Answer 3

Two or more forces act on object

Equal in size and magnitude

Question 4

Magnitude

Answer 4

Amount of force acting on a object

Question 5

Net Forces

Answer 5

Sum of all forces

Strongest one changes the object’s velocity

Question 6

Gravity

Answer 6

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

Question 7

Electromagnetic Forces

Answer 7

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

Question 8

Weak Nuclear Forces

Answer 8

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

Question 9

Strong Nuclear Forces

Answer 9

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

Question 10

Contact Forces

Answer 10

Two objects touch to exchange forces

Question 11

Field Forces

Answer 11

Act without touch

Question 12

Net Forces

Answer 12

Sum of all forces acting on an object

Question 13

Friction

Answer 13

Force that opposes motion

Question 14

Static Friction

Answer 14

Resists the initiation of sliding motion

- Not moving, and it won’t start

Question 15

Kinetic Friction

Answer 15

Opposes the movement of two surface

Question 16

First Law of Motion

Answer 16

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

Question 17

Second Law of Motion

Answer 17

Force= mass*acceleration

Question 18

Universal Law of Gravitation

Answer 18

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