22 terms

jg11123PLUS

Newtons 1st Law

an object at rest tends to stay at rest. an object in motion tends to stay in motion in a straight line at a constant speed until another force acts on the object

Inertia

the tendency for an object to resist a chance in motion

AKA newtons 1st law

law of inertia (AKA___)

Speed

the distance an object travels per unit of time

Speed formula

distance/time=_____ (((m/s mph)))

Velocity

speed in a given direction EX: 50mph North

Acceleration

a change in velocity... the rate at which velocity changes.... increasing speed, decreasing speed, or changing direction

Acceleration formula

Final speed- Initial speed/time=______________

Deceleration

slowing down

Mass

the amount of matter in an object

force

a push or a pull on an object

the two things that effect acceleration

mass and force

Increased force=

greater acceleration

Increased mass=

lower acceleration

Newtons Second law

How fast an object picks up speed (accelerates) or slows down (decelerates) depends on the amount of force used and on its mass

Newtons Second law mathematically

F=MA.... Force=Mass * acceleration.... acceleration=force/mass

Newtons Third Law

for every action there is an equal and opposite reaction

Average speed formula

total distance/total time=_________

Static Friction

friction that acts on objects at rest

Sliding friction

occurs when objects slide over one another

Rolling Friction

occurs when objects roll over one another

Fluid Friction

occurs as an object moves through a fluid... air resistance