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Chapter 3-3

Pressure and Gravity

What is gravity? The force of attraction between all objects in the universe.
What is pressure? The force particles of a fluid exert over a certain area due to their weight and motion.
Why do your ears hurt when you dive to the bottom of a pool? Because there is more pressure at the bottom of the pool than at the surface of the water.
How do you convert your weight on Earth to your weight on the moon? Multiply your weight by 1/6.
Why do divers have to rise slowly? Because nitrogen bubbles will develop in your blood.
Why do you think that dams have to be thicker at the bottom? Because the water pressure is higher at the bottom.
Why do your ears sometimes hurt when you're flying in a plane? Because the amount of air pressure is higher at higher altitudes.
Calculate how much you would weigh on the moon if you weigh 133.5 lbs on Earth. 22.25 lbs
What is the acceleration due to gravity? 9.8 m/s/s
Why can you jump so high on the moon? Because the moon's gravitational force is much less than the Earth's, making you weigh less.
Calculate a semi-truck's weight on the moon if it weighs about 9,000 kg on the Earth (convert kg to lbs). 9000 kg = about 3300 lbs
Created by: PotatoMan123