Physics 163

Unit 3: Motion in Two-Dimensions

Problem Set E

Problem 4:

A 336.99-Newton sign is hung using two cables which make an angle of 16.4 degrees with the horizontal. Determine the tension (in Newtons) in a single cable.

• Read the problem carefully and diagram the physical situation (free-body diagram)
• Identify known and unknown information in an organized manner (write on diagram)
• Take the time to plot out a strategy prior to beginning the solution
• Identify an appropriate formula to use (usually created using a trigonometric function)
• Perform step-by-step algebraic manipulations

TIP:

When done with Problem 4, compare your answer to the answer to Problem 3. What do you notice? Why would this be?

A discussion of basic principles related to Set E and equilibrium problems is provided on the Set E Overview page.

Detailed information and examples of equilibrium problems are available online at The Physics Classroom.

Detailed information about the use of trigonometric functions to determine the components of vectors is available online at The Physics Classroom.

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