challenge problems
DESCRIPTION
Challenge Problems. Form groups of 3 (no bigger) Collect a Whiteboard, and pens/erasers from the front In a moment I will post a question, please work on the problem in your groups showing all steps Use diagrams/pictures where necessary NOTE : Next Tuesday we be Phys 12 AP not Chem 12 AP - PowerPoint PPT PresentationTRANSCRIPT
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Challenge Problems
1. Form groups of 3 (no bigger)
2. Collect a Whiteboard, and pens/erasers from the front
3. In a moment I will post a question, please work on the problem in your groups showing all steps
4. Use diagrams/pictures where necessary
NOTE: Next Tuesday we be Phys 12 AP not Chem 12 AP
Next Class: Quiz on Hydrostatic Fluids
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Pascal’s LawIt was determined that a 400N input force could lift a 4000N weight on the other side (i.e. that with the greater area).
If the amount of input force does not increase, how can it lift a greater weight?
If anything, the fact that the force is spread over a larger area on the output side suggests the overall pressure exerted on that side would decrease.
Where does that extra force come from?
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Pascal’s LawIf the amount of input force does not increase, how can it lift a greater weight?
Pressure is a measure of Force/Area, if the area increases the Force increases
Where does that extra force come from?
In order to lift the second lever even a short distance, the first lever must be cover a large distance (see diagram to the right) Win = Wout
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Water Flowing from a Pipe
Water flows from a pipe at the bottom of a water tank. It is accelerated from the tank by the force due to the hydrostatic pressure of the water in the tank.
HINT: The water flows from the tank at a speed v, which can be computed using the formula P = ½ρv2. The pipe sits 1.4 m above the ground and the bucket is 3.3 m’s from the tank.
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Answer
Depth = 1.94 m’s
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Archimedes Principle
Archimedes investigated the composition of a royal crown using its weight and the amount of water it displaced. Use the following values to find the DENSITY of the crown.
Weight of the Crown: 96.6N
Weight of the Displaced Water: 5.01 N
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Answer
Density = 19.3 kg/m3
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Physics 12 AP Formula Sheet + Constants
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Lab - Buoyancy
Your Task: Determine the density and volume of the unknown metal sample