a diagram showing ALL the forces acting on an object

Force = mass x acceleration

object's tendency to resist change in motion

states that for a projectile the horizontal component of its motion has NO effect on the vertical component

a contact force that resists the sliding motion of two surfaces that are touching (acts in opposite direction of motion)

Friction that acts on objects that are not moving (resists the start of motion due to inertia)

Friction acting on object moving on a surface

stored energy based on position (height)

energy based on motion

quantity with magnitude only

A quantity with magnitude and direction

speed up in (+) direction or slow down in (-) direction

speed up in (-) direction or slow down in (+) direction

constant velocity or no movement

where PE is greatest and KE is the least

where KE is the greates and PE is the least

where PE = KE

Energy cannot be created or destroyed ; remains constant in closed system

SI unit of energy

SI unit of force

speed up, slow down, change direction

an object to accelerate

no change in motion

sum of PE and KE

downward field force causing acceleration of 9.8 m/s^2

vertical velocity is descreasing & horizontal velocity is constant

vertical velocity is increasing & horizontal velocity is constant

vertical velocity is zero & horizontal velocity is constant