GRAVITY AND MOTION

GRAVITY AND ACCELERATION

• Objects fall to the ground at the same rate
• Acceleration due to gravity depends on force

ACCELERATION AND VELOCITY

• Acceleration is the change of velocity over time.
• Velocity is speedin a given direction
• Objects fall at a speed of 9.8m'2
• Unbalanced forces cause object to move.
• Gravity has a net force greater than zero.

ACCELERATION AND TERMINAL VELOCITY

• As the speed of a falling object increases air resistance increases
• Terminal velocity:When the downward motion of an object increases the air resistance increases the
• And balances out to Zero net force the acceleration stops increasing.

AIR RESISTANCE

• Air resistance opposes gravity
• Depends on the surface area
• The size of the object
• The shape of the object
• The speed of a object

FREE FALL AND AIR RESISTANCE

• To have true freefall there must be no air resistance

PROJECTIAL MOTION

• Two movements:Horizontal - verticle