Solve the following problems on your own paper. Please:

• Show all work.
• Put a box around your final answer to each problem.
• Be sure proper significant figures (SF) used for all answers.
• Separate all solutions with a horizontal line on your paper.
• A random selection of four even problems will be graded for 25 points each.
• Solutions for suggested odd problems can be seen by following links.
• Solutions for even problems will be linked from this page after the due date.

Chapter 9

#14

Combine the area for all four tires to find the weight of the car.

#20

Assume for part (a) that the pressure inside the vacuum cleaner is zero. For (b), the maximum force is just the external pressure at that depth multiplied by the cross-sectional area of the shell, half of that force would be applied to each half of the shell, roughly.

#24

You don't really need to convert units for this one. You may answer in either pounds or Newtons. Use static equilibrium techniques (sum the torques and set equal to zero) to help solve this, using the leftmost hinge as your pivot.

#26

The volume of a hemisphere is just half the volume of a sphere. You'll need that formula to know the volume of displaced fluid here.

#28

Ask in class if you need a hint on this one. Example 9.9 is similar.

#30

You only need to do part (a) and (b) of this one.

#34

Answer with 3 SF. Keep in mind that the block has three forces on it: spring force, weight and buoyancy.

#36

This is similar to example 9.8 Answer with 3 SF.

#38

Use the volume of the air mattress to figure out the maximum possible buoyant force, then set that equal to the total weight that can be supported.

#40

Be sure to work in mks units throughout this problem.

#46

Like with problems 43 and 45, you should assume that the velocity of the fluid in a region of relatively large cross-sectional area is effectively zero.

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Suggested problems:

C1, C2, C4, C5, C8, C9, C10, C11, C12, C15, C17, C18, #13, #15, #16, #17, #19, #22, #23, #27, #29, #31, #32, #33, #35, #37, #39, #41, #42, #43, #44, #45, #47, #48, #49, #50, #51, #71, #73, #74