Pressure Chapter 3.3.

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Presentation transcript:

Pressure Chapter 3.3

Pressure Pressure = Force ÷ Area P = F Force: Newtons (N) Pressure: A measure of how much force is acting on a certain area Pressure depends on Force and Area Pressure = Force ÷ Area P = F Force: Newtons (N) A Area: square meters (m2) Pressure: Pascal (Pa)

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Think about it… What happens as you climb a high mountain? Does air pressure increase or decrease?

Pressure in Air Air exerts a pressure on you at all times: Atmospheric Pressure Changing Elevation: as you increase elevation (climb a mountain), air pressure decreases. There is less air above you pushing down. Changing Density: Air at lower elevations is denser, higher pressure Video

Think about it… What happens as you dive deeper into a pool? Does the pressure increase or decrease?

Pressure of Water The deeper you swim, the more water is above you. Water pressure increases with greater depth. Water exerts more pressure on you than air because water is more dense If you were to dive 1,000 meters into the ocean, the pressure would be 100x greater than air pressure.