Chapter 6 Forces in Fluids Winter 2011

Chapter 6 Forces in Fluids Winter 2011 - Last Time: Chapter...

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Chapter 6 Forces in Fluids Last Time: s Applications of Newton’s Laws s Consider roles of Gravity Charge Contact forces (esp. friction) s Are the forces balanced/unbalanced? Is there acceleration? Quiz An object must always accelerate in the direction it is moving. If you are moving up, your acceleration is up. If you move backwards, your acceleration is ackwards, etc. backwards, etc. A) True B) False Quiz The Moon’s motion around the Earth can be understood in terms of: A) One force directed towards the Earth B) One force directed away from the Earth C) One force in the direction of the Moon’s motion D) Two balanced forces E) Two unbalanced forces
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I have read all of chapter 6 A. Yes B. No s Pressure = Force / Area So ressure= 500 lbs/100 in 2 What is pressure? 500 lbs Pressure= 500 lbs/100 in = 5 lbs/in 2 10 in 10 in If the area experiencing the force is cut in half, the pressure A. is also cut in half. B. decreases to ¼ the original. C. is doubled. D. increases by 4 times the original value. E. stays the same. Pressure s Although the ballerina’s weight doesn’t change, she exerts a greater pressure on the floor when on point because her weight is distributed over a smaller area.
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Pascal’s Law Pressure applied to any part of a bounded fluid transmits equally to every other part with no loss. The pressure acts at right angles to
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Chapter 6 Forces in Fluids Winter 2011 - Last Time: Chapter...

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