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MT1_Sample_1

MT1_Sample_1 - Phys 211 Sample Exam 1 The figure shows the...

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Phys 211 Sample Exam 1. The figure shows the velocity as a function of time for a particle. What is the particle's position at time t = 3.0 s if it starts at x = 5 m at t = 0? -3 -2 -1 0 1 2 3 4 5 v (m/s) 6 7 time(s) A. 0 m B. 7 m C. 12 m D. 9 m E. 5 m 2. A motorist drives north for 30.0 min at 80.0 km/h and then stops for 10.0 min. He then continues north, traveling 120 km in 2 hours. What is his average speed? A. 32 km/h B. 73 km/h C. 10 km/h D. 21 km/h E. 60 km/h Page 1

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Phys 211 Sample Exam 3. A 1.7 kg mass has an acceleration of ( ˆˆ 3.1 2.5 ij ) m/s 2 . Only two forces act on the mass. If one of the forces is ( 2.5 1.4 −+ ) N, what is the magnitude of the other force? A. 9.6 N B. 7.2 N C. 6.3 N D. 8.3 N E. 4.0 N 4. In the diagram, has a magnitude 12 m and has magnitude 8 m. The component of AB x A B + GG is about: A. 7.6 m B. 5.5 m C. 14 m D. 15 m E. 12 m Page 2
Phys 211 Sample Exam 5. An airplane makes a gradual 90° turn while flying at a constant speed of 200 m/s. The process takes 20.0 seconds to complete. For this turn the magnitude of the average acceleration of the plane is: A. 40 m/s 2 B. 14 m/s 2 C. zero D. 20 m/s 2 E. 10 m/s 2 6. A lioness starts at rest at t = 0 s and then runs in a straight line. If she accelerates at 15 m/s 2 from t = 0 s to t = 1.5 s and then runs at constant speed, at what time does she reach 60 m away from her starting point? A. 3.8 s B. 1.9 s C. 3.4 s D. 4.0 s E. 2.7 s 7. A wrecking ball (mass = 500 kg) is attached by a chain to a crane. It is accelerating downwards, and its speed increases from 2 m/s to 4 m/s in a time of 2 s. Calculate the tension in the chain , assuming that the tension remains constant during that time.

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MT1_Sample_1 - Phys 211 Sample Exam 1 The figure shows the...

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