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 and mass
• Gravity is the downward, unbalanced force that acts on a falling object
• All falling objects fall at 9.8 meters per second

ACCELERATION AND VELOCITY

• Acceleration is the change in velocity over time
• Velocity is speed in a given direction
• Unbalanced forces cause objects to accelerate
• For every second an object falls its downward velocity increases

ACCELERATION AND TERMINAL VELOCITY

• As the speed of a falling object increase, so does air resistance
• Terminal velocity - the downward force of gravity equals the upward force of air resistance
• Net force = 0 n
• Falling object STOP accelerating

AIR RESISTANCE

• 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

• Free fall happens when the only force acting on it is gravity
• There can be no air resistance

PROJECTILE MOTION

• Two movements
• Force gives projectile motion a horizontal movement
• Gravity brings the object down in a vertical movement
• The force with gravity makes a curved path