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Answers
Answer:
pressure exerted by air is called as atmospheric pressure.
Explanation:
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Answer:
Answer 1 ) Advantages of Friction:
Friction is responsible for many types of motion. It helps us walk on the ground. Brakes in a car make use of friction to stop the car. Asteroids are burnt in the atmosphere before reaching Earth due to friction.
Answer 2) Rolling friction takes place when an object rolls on the surface.
Sliding friction takes place when two surfaces are rubbed against each other. Rolling friction takes place due to the deformation of surfaces.
Answer 3) Board pins are made sharp as they can easily penetrate the surface of the soft board .
Answer 4) the pressure exerted by the weight of the atmosphere, which at sea level has a mean value of 101,325 pascals (roughly 14.6959 pounds per square inch).
Explanation:
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