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Unformatted text preview: Practice Exam 1 (Chs. 1-3) 1. During a relay race, runner A runs a certain distance due north and then hands off the baton to runner B, who runs for the same distance in a direction south of east. The two displacement vectors and can be added together to give a resultant vector . Which drawing correctly shows the resultant vector? A.1 B. 2 C. 3 D.4 E. None of these. 2. A projectile is launched over level ground at a launch angle of 70 o with an initial velocity v o . At some later time while the projectile is on its way to the peak in its trajectory, its velocity vector makes an angle of 50 o with respect to the horizontal. What is the magnitude of the projectiles acceleration at that point? A. 0 B. g C. v o cos50 o D. v o sin50 o E. v o sin70 o 3. Two stones are thrown with the same initial speed v o off the top of a tall cliff into the ocean below. Stone 1 is thrown at an angle below the horizontal, and stone 2 is thrown at an angle above the horizontal (see figure). Upon striking the water, the velocity vectors for stone 1 and stone 2 make an angle of and with respect to the water....
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This note was uploaded on 09/25/2011 for the course PHYS 2002 taught by Professor Blackmon during the Spring '08 term at LSU.
- Spring '08