Physics Key Concepts

Question 1

Kinematic Equation I

Answer 1

Xf = Xi + Vit + 1/2at²

Question 2

Kinematic Equation II

Answer 2

Vf = Vi + at

Question 3

Kinematic Equation III

Answer 3

Vf² = Vi² + 2aΔx

Question 4

Trapezoid Area

Answer 4

A = 1/2h(b1 + b2)

Question 5

PvT Graph Slope

Answer 5

Velocity

Question 6

VvT Graph Slope

Answer 6

acceleration

Question 7

PvT/VvT Graph area under curve

Answer 7

displacement

Question 8

Newtons First Law

Answer 8

objects at rest remain at rest, objects in motion remain in motion unless acted upon by an unbalanced force.

Question 9

Newtons Second Law

Answer 9

F = ma

Question 10

Newtons Third Law

Answer 10

Objects exert equal and opposite forces when acted against

Question 11

Inertia

Answer 11

a tendency to do nothing or to remain unchanged

Question 12

Weight

Answer 12

Mass * Gravity

mg

Question 13

Velocity (V)

Answer 13

d/t

Question 14

Acceleration

Answer 14

Vf - Vi/t

Question 15

Force

Answer 15

Mass * Acceleration

ma

Question 16

Momentum (P)

Answer 16

mv

Question 17

Impulse

Answer 17

Force * Time
Ft

change in momentum
Δp

Question 18

Work

Answer 18

Force * Distance
Fd

Change in kinetic energy
ΔKE

Force * Cos(Theta) * Distance
F * cos(θ) * d
Fcos(θ) * d

Question 19

Types of Forces

Answer 19

STRONG -> WEAK
Strong Nuclear Energy Force
Electromagnetic Force
Weak Nuclear Force
Gravity

Question 20

Contact Force

Answer 20

force exerted when an object is in contact with another object

Question 21

Field Force

Answer 21

force exerted on an object which is not in contact with another

Question 22

Normal Force

Answer 22

mg

Fn = Fg

Fn = mgcos(θ)

Fn = Ff/μ

Question 23

Tension Force

Answer 23

Ft = mg + ma IF UP

Ft = mg - ma IF DOWN

Question 24

Friction Force

Answer 24

Ff = μFn

Question 25

2 friction forces

Answer 25

Kinetic friction

Static friction

Question 26

Newtons Law of Universal Gravitation

Answer 26

Fg = GM1M2/r²

G = 6.67 x 10 (-11) m³/kgs²

The force of gravity between 2 objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

Question 27

Kinetic Friction

Answer 27

μkFn

the friction present between two or more objects that are in motion with respect to each other

Question 28

Static Friction

Answer 28

Fs = μsFn

Static friction is a force that keeps an object at rest

Question 29

G constant

Answer 29

G = 6.67 x 10 (-11) m³/kgs²

Question 30

sin(θ)

Answer 30

opposite/hypotenuse

Question 31

cos(θ)

Answer 31

adjacent/hypotenuse

Question 32

tan(θ)

Answer 32

opposite/adjacent

Question 33

Spring Force

Answer 33

Fs = kx

spring always want its equilibrium position. moves depending on whether it’s compressed or stretched

Question 34

Spring Constant

Answer 34

K

measured in N/m

Question 35

Elastic Limit

Answer 35

point where if you pull to hard, spring will not return to equilibrium

Question 36

Fnet

Answer 36

all forces combined

Question 37

Dynamic equilibrium mathematical description

Answer 37

ΣF = 0

V != 0

Question 38

Static equilibrium mathematical description

Answer 38

ΣF = 0
V = 0

Question 39

Specular reflection

Answer 39

reflected rays are parallel

happens when light reflects off shiny surface

Question 40

Diffuse reflection

Answer 40

reflected rays scatter

occurs when light strikes rough surface

Question 41

Gravitational Potential Energy

Answer 41

mgh

Question 42

Kinetic Potential Energy

Answer 42

1/2mv²