AP Physics - Unit 2 - Dynamics

projectile

projectile

an object in flight experiencing only gravity

horizontal displacement from initial position

range

When an object is launched horizontally, the object continues to move at a constant speed in X direction

horizontal launch

90 degree

what launch angle creates the greatest height

45 degrees

what angle produces the greatest range?

range

complementary angles produce the same _____

vx = vi(cosx)

vx (horizontal velocity) formula

vy = vi(sinx)

vy (vertical velocity) formula

combination of all forces acting on an object

net force

acceleration

when forces are unbalanced, we get __________

when net force = 0 (balanced)

equillibium

law of intertia (objects in motion stay in motion unless acted upon by another force)

newton’s first law of motion

resistance to change

intertia

net force = m*a

newtons 2nd law of motion

kg

what is mass measured in?

For every action force, there is a reaction force (equal opposite)

newton’s 3rd laws motion

pulling force; usually with a rope, cable, or string

tension force

any force applied to object

applied force

always perpendicular to surface

normal force (surface force)

ff = mu +* fn

friction force

amount of matter (scalar)

mass

Fg (vector)

weight

Friction when the surfaces are not sliding 

(mu s > mu k)

static friction

f = -kx

(X = amount of stretch/compress away from start;

K = stiffness)

spring force