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## PowerPoint Slideshow about ' Free Fall' - oksana

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Free Fall

- Falling without air resistance
- Gravity is the only force acting upon the object causing the object to change it’s velocity
- Acceleration (change in velocity) due to gravity on earth is 9.8 m/sec/sec for all objects
- That means . . . When an object is in free fall it will be increasing its velocity 9.8 m/sec every second

∑F=ma

In Free Fall

Free Fall neglecting friction – which object – the elephant or the feather-will hit the ground first

- The elephant and the feather each have the same force of gravity
- The elephant has the greatest acceleration (change in velocity)
- On earth, all objects (whether an elephant or a feather) have the same force of gravity
- The elephant and the feather have the same acceleration (change in velocity) due to gravity

True or false:

Free fall cont. elephant or the feather-will hit the ground first

- In the absence of air resistance, the elephant and the feather land at the same time.
- The force of gravity experienced by an object is dependent upon the mass of that object.

RULE: all objects (regardless of their mass)

experience the same acceleration

(change in velocity) when in a

state of free fall

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