to describe velocity you need to know

speed and direction

according to Newton’s second law of motion

an object acted on by a force will accelerate in the direction of the force; F=m*a

the distance traveled divided by the time taken to travel the distance is

speed

the statement “for every action, there is an equal but opposite reaction” is a statement of

Newton’s 3rd Law

inertia is

the tendency of an object to resist a change in motion and is dependent on the mass of the object

acceleration is a change in

speed or direction. either speed up, slow down, or change direction

momentum is a measure of

how hard it is to stop an object; momentum=m*v

whenever a body is in motion

there is always friction to oppose the motion

if gravity did not affect the path of a horizontally thrown ball, the ball would

continue in a straight path until acted on by another force

the force you have to overcome to start an object moving is

static friction

when you graph the motion of an object

you put time on the horizontal axis and distance on the vertical axis

a feather falls through the air more slowly than a brick because of

air resistance

Newton’s first law of motion states that an object remains at rest unless

an unbalanced force acts on it

forces that are equal in size but opposite in direction are

balanced

air resistance increases

as you move faster

acceleration involves a change in

velocity

the relationship among force, mass, and acceleration is stated in

Newton’s 2nd law

speed is the rate of change in

distance

distance

is a length traveled

displacement

is the difference between start and end points and direction

speed

is the distance traveled divided by the time taken to travel that distance

velocity

is speed and direction of an object

positive acceleration

means that the object is getting faster over time, or speeding up

negative acceleration

means that the object is slowing down