GRAVITY AND MOTION

GRAVITY AND ACCELERATION

• objects fall to the ground at the same rate, regardless of mass or weight
• acceleration due to gravity depends on force an and mass

ACCELERATION AND VELOCITY

• acceleratoin is the change of velocity over time
• velocity is speed in a given direction
• unbalanced forces cause objects to accelerate
• gravity is the downward force that acts on falling objects = 9.8m/sec
• every second an object falls, it downward velocity increases by 9.8m/sec

ACCELERATION AND TERMINAL VELOCITY

• air resistance increases as the speed of a falling object increases
• terminal velocity - when the downward force of gravity equals the upward force of air resistance
• net force = 0N
• falling objects stop accelerating

AIR RESISTANCE

• the force that opposes gravity
• acts in opposition to objects falling through the air
• depends on surface area, size, shape, speed of the object

FREE FALL AND AIR RESISTANCE

• an object is in free fall when the only force acting on it is gravity
• there can be NO air resistance

PROJECTILE MOTION

• two movements: horizontal and vertical
• combination of the two movements make the object form a curved path