Physics 163

Unit 3: Motion in Two-Dimensions

Problem Set A

Problem 3:

A quarterback takes the ball from the line of scrimmage, runs backward for 6.7 yards, then sideways parallel to the line of scrimmage for 8 yards. At this point, he throws a 27.2-yard forward pass straight down field perpendicular to the line of scrimmage. What is the magnitude (in yards) of the football's resultant displacement?

• Read the problem carefully and diagram the physical situation (vector addition diagram)
• Identify known and unknown information in an organized manner (label vectors)
• Take the time to plot out a strategy prior to beginning the solution
• Identify an appropriate formula to use
• Perform step-by-step algebraic manipulations

Detailed information about the addition of vectors is provided online at The Physics Classroom.

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