GRAVITY AND MOTION

GRAVITY AND ACCELERATION

• Objects fall to the ground at the same rate - regardless of mass/wheight.
• Acceleration due to gravity depends on force and mass.

ACCELERATION AND VELOCITY

• Acceleration is the change in velocity over time .
• Velocity is speed in a given direction.
• Unbalanced forces cause objects to accelerate.
• Gravity is the downward, unbalanced force that acts on falling objects.=9.8m/s2
• For every second an object falls, its downward velocity increases by 9.8m/s2

ACCELERATION AND TERMINAL VELOCITY

• As the speed of the falling object increases, air resistance increases.
• Terminal Velocity- the downward force of gravity=the upward force of air resistance.
• Net Force = 0N

AIR RESISTANCE

• Force that opposes gravity.
• Acts in opposition to objects falling through the air.
• Depends on surface area, size, shape and speed on the object.

FREE FALL AND AIR RESISTANCE

• An object is in freefall when the only force acting on it is gravity.
• The can be no air resistance.

PROJECTILE MOTION

• There are two movements, force (horizontal) and gravity (vertical).
• This results in a curved path.