GRAVITY AND MOTION

GRAVITY AND ACCELERATION

• Objects fall to the ground at the same rate- regardless of mass/weight
• Acclrration due do to gravity depends on force and mass

ACCELERATION AND VELOCITY

• Acceleration is the change of velocity over time
• Velocity is speed in a given dircetion
• Unbalanced forces cause objects to accelerate
• Gravity is the downward, unbalanced force that acts on falling objects- 9.8 m/s/s
• For every second an object falls, it's downward velocity increases by 9.8 m/sec

ACCELERATION AND TERMINAL VELOCITY

• As the speed of a falling object increases, air resistance increases
• Terminal velocity is when the downward force of gravity equals the upward force of air resistance
• Net force: 0 Newtons
• Falling objects STOPS accelerating

AIR RESISTANCE

• Force that opposes gravity
• Acts in opposition to objects fallong through the air
• Depends on surface area, size, shape, and 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: Force and Gravity
• Force is horizontal ------------>
• Gravity is vertical
• Projectile motion takes a curved path