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 3

#2

Answer parts (a) and (b) with 3 SF. For (b), I want an angle with respect to either East or West.

#12

Answer with magnitude and direction. Use 3 SF.

#22

Give your final answer in feet. Note that in reality the ball won't drop this far due to aerodynamics.

#24

Keep in mind that the problem is asking for the velocity (magnitude and direction) of the stone the instant before it strikes the beach.

#28

Answer with 3 SF. Note that this problems asks for the components of the displacement, not magnitude and direction.

#32

Solve for the x-motion first to find the travel time.

#44

Break each force into components (with the proper sign for each component!!!), then add up the components and recombine the final sum for each component into a vector with magnitude and direction.

#52

There is an algebraic trick to this one. Set the initial velocity in the x direction equal to v cos 15 and the initial velocity in the y direction equal to v sin 15. So the two unknowns are v and t. When solving, keep in mind that tan 15 = sin 15/cos 15. Answer with 2 SF.

#56

What must the y-component of the second ball's initial velocity be? Knowing that answer should give you enough information to finish this problem completely.

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Suggested odd problems:

C1, C2, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, #9, #10, #11, #13, #14, #15, #16, #17, #18, #19, #20, #23, #25, #26, #27, #29, #30, #31, #33, #34, #43, #49, #51, #54, #55, #57, #58