Transcript Free Fall & Air Resistance

Free Fall & Air Resistance
The Earth’s ________ pulls objects towards its center
When the only force acting on a falling object is
gravity, the object is said to be in __________
An object in free fall accelerates as it falls
In free fall the force of gravity is an unbalanced
force, and unbalanced forces cause an object to
_______________
Free Fall & Air Resistance
gravity pulls objects towards its center
The Earth’s ________
When the only force acting on a falling object is
free fall
gravity, the object is said to be in __________
An object in free fall accelerates as it falls
In free fall the force of gravity is an unbalanced
force, and unbalanced forces cause an object to
accelerate
_______________
Acceleration
Objects accelerate at 10 m/s/s
So: After 1 sec an object has a speed of?
After 2 sec?
_________
After 5 sec?
_________
In free fall: velocity = acceleration (x) time
Or
__________
Acceleration
Objects accelerate at 10 m/s/s
So: After 1 sec an object has a speed of? 10 m/s
After 2 sec?
20m/s
_________
After 5 sec?
50m/s
_________
In free fall: velocity = acceleration (x) time
Or
v=at
__________
Free Fall & Air Resistance
All objects fall at the same rate unless they have
___ ___________ on them
___ __________ - Objects falling through air
experience _______ friction
Air Resistance is not the same for all objects:
The greater the surface area of an object –
the _________ the air resistance
Air resistance increases as you go faster
Eventually, the air resistance = the _____of ________
________ ________ – the maximum velocity a
falling object can have. No more ______________
Free Fall & Air Resistance
All objects fall at the same rate unless they have
___
___________ on them
air resistance
Air Resistance
___
__________ - Objects falling through air
experience _______
fluid friction
Air Resistance is not the same for all objects:
The greater the surface area of an object –
greater the air resistance
the _________
Air resistance increases as you go faster
force ________
gravity
Eventually, the air resistance = the _____of
Terminal ________
velocity – the maximum velocity a
________
acceleration
falling object can have. No more ______________