Chapter 3-w-key - Chapter 3 Multiple Choice Homework...

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1 Chapter 3 - Multiple Choice Homework Question 1: A bug starts at point A , crawls 8.0 cm east, then 5.0 cm south, 3.0 cm west, and 4.0 cm north to point B . (a) How far north and east is B from A ? (b) Find the displacement from A to B both graphically and algebraically. 1) (a) 5.0 cm - EAST, 1.0 cm - SOUTH, (b) 5.10 cm - 11.3° SOUTH OF EAST 2) (a) 11.0 cm - EAST, 1.0 cm - SOUTH, (b) 5.10 cm - 11.3° SOUTH OF EAST 3) (a) 5.0 cm - EAST, 1.0 cm - NORTH, (b) 5.1 cm - 11.3° NORTH OF EAST 4) (a) 5.0 cm - EAST, 9.0 cm - SOUTH, (b) 10.1 cm - 60.9° SOUTH OF EAST Correct Answer 1) Question 2: What displacement must be added to a 50 cm displacement in the +x-direction to give a resultant displacement of 85 cm at 25 degrees? 1) 69 cm at 90° 2) 45 cm at 37° 3) 62 cm at 82° 4) 45 cm at 53° Correct Answer 4) Question 3: Starting at the origin of coordinates, the following displacements are made in the xy -plane (that is, the displacements are coplanar): 60 mm in the + y -direction, 30 mm in the - x -direction, 40 mm at 150°, and 50 mm at 240°. Find the resultant displacement both graphically and algebraically.
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