# P3 - Falling Safely

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Why do all objects fall with the same acceleration?
Because of gravity as long as the effect of air resistance is very small
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What does the size of the air resistance force on a falling object depend on?
It's cross sectional area, the larger the area the greater the air resistance. Its speed, the faster it falls the greater the air resistance
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When does air resistance have a significant effect on motion?
When it is large compared to the weight of the falling object
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Define terminal speed
The maximum speed of a falling object when it can no longer accelerate from the gravitational pull or any constant force. This is due to air resistance negating the force of gravity acting on the object.
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What is the force on each kilogram of mass on earth?
g = 10 N/Kg
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Is the gravitational field strength affected by atmospheric conditions?
No
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What does the gravitational field strength varies on?
With position on the Earth's surface, with height above or depth below the earth's surface
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## Other cards in this set

### Card 2

#### Front

What does the size of the air resistance force on a falling object depend on?

#### Back

It's cross sectional area, the larger the area the greater the air resistance. Its speed, the faster it falls the greater the air resistance

### Card 3

#### Front

When does air resistance have a significant effect on motion?

### Card 4

#### Front

Define terminal speed

### Card 5

#### Front

What is the force on each kilogram of mass on earth?