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Unformatted text preview: velagala (srv322) HW 4 Kleinman (58225) 1 This print-out should have 31 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. This HW covers Chapters 5 and 6. 001 10.0 points A heavily loaded freight train moves with constant velocity. What is the relationship between the net force on the first car ( F 1 ) and the net force on the last car ( F 2 )? 1. F 1 = F 2 2. F 1 &gt; F 2 3. Unable to determine. 4. F 1 &lt; F 2 002 10.0 points A toy car is given a quick push so that it rolls up an inclined ramp. After it is released, it rolls up, reaches its highest point and rolls back down again. Friction is so small it can be ignored. What net force acts on the car? 1. Net constant force down the ramp 2. Net increasing force down the ramp 3. Net constant force up the ramp 4. Net decreasing force down the ramp 5. Net decreasing force up the ramp 6. Net force of zero 7. Net increasing force up the ramp 003 10.0 points Despite a very strong wind, a tennis player manages to hit a tennis ball with her racquet so that the ball passes over the net and lands in her opponents court. Consider the following forces: 1 - A downward force of gravity. 2 - A force by the hit. 3 - A force exerted by the air. Which of the above forces is (are) acting on the tennis ball after it has left contact with the racquet and before it touches the ground? 1. 1, 2 and 3 2. 2 and 3 3. 1 and 2 4. 1 only 5. 1 and 3 004 (part 1 of 2) 10.0 points The wind exerts a force of 261 N North on a sailboat, while the water exerts a force of 90 N West on the sailboat. What is the magnitude of the net external force on the sailboat? Answer in units of N. 005 (part 2 of 2) 10.0 points How many degrees west of north is this net external force directed? Answer in units of . 006 10.0 points The position of a toy locomotive moving on a straight track along the x-axis is given by the equation x = t 3- 6 t 2 + 9 t , where x is in meters and t is in seconds. The net force on the locomotive is equal to zero when t is equal to Answer in units of s....
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This note was uploaded on 05/06/2009 for the course PHY303K 303k taught by Professor Niu during the Spring '08 term at A.T. Still University.
- Spring '08