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meters per 2nd

kilograms

it goes slower

force

net force

balanced forces

zero

if the forces are _______, their effects dont cancel each other.

unbalanced forces

...

if the net force acting on an object is zero, the object remains at rest, or if the object is already moving, continues to move in a straight line with constant speed

Newton's first law of motion

friction

static friction

sliding friction

rolling friction

_________ connects force, acceleration, and mass.... an object acted upon by a force will accelerate in the direction of the force

Newton's 2nd Law of Motion

Acceleration Equation =

acceleration (in meters/second) = net force (Newtons)/ mass (in kilograms) ........ a = Fnet/m

9.8 m/s2

...

weight

center of mass

according to _____________, forces always act in equal but opposite pairs... for every action there is an equal but opposite reaction

Newton's 3rd Law of Motion

PRESSURE

pressure equation =

pressure (in pascal's) = force (in newtons) / area (in meters squared) ....... P = F/A

weight =

weight = mass * acceleration

fluid

buoyant force

why does an object sink?

if the weight of the object is greater than the buoyant force, the net force on the object is downward and it sinks

...

the buoyant force on an object is equal to the weight of the fluid it displaces

Archimedes Principle

density

density equation

D = m/v.............. density = mass / volume

when a force is applied to a fluid in closed container, the pressure in the fluid increases everywhere by the same amount

Pascal's Principle

hydraulic system

when the speed of a fluid increases, the pressure exerted by the fluid decreases

Bernoulli's Principle

energy

kinetic energy

potential energy

thermal energy

chemical energy

the energy that is carried by an electric current

electrical energy

nuclear energy

energy is never created nor destroyed

law of conservation of energy

generator

turbine

an energy source that is used up much faster than it can be replaced

nonrewnewable resource

an energy source that is replinished continually

renewable resource

energy that is safer and cause less harm to the environment.... include solar, wind, and geothermal energy

alternative resources

_______________ is an energy source that cant be used up by humans

inexhaustible resource

photovoltaic

temperature

temperature conversion equations

F to C.... C = (5/9)(F-32)
C to F..... F = (9/5)(C) + 32

K = C = 273

thermal energy

heat

conduction

convection

conductors

specific heat

increase in temperature of a body of water caused by adding warmer water

thermal pollution

heat engine

the fuel burns in a combustion chamber inside the engine

internal combustion engine

speed equation

speed (in meters/second) = distance (in meters) / time (in seconds) ......s = d / t

average speed

the speed of an object at one instant of time is the object's ________

instantaneous speed

velocity

acceleration

acceleration equation

acceleration (in m/s2) = final speed - inital speed / time

inertia

momentum

"p"

momentum equation

momentum = mass * velocity

the total momentum of objects that collide is the same before and after the collision

law of conservaition of momentum

decrease

FLUID

solar

chemical

magma

Example: