* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Exam 1 - USU Physics
Survey
Document related concepts
Bra–ket notation wikipedia , lookup
Brownian motion wikipedia , lookup
Fictitious force wikipedia , lookup
Specific impulse wikipedia , lookup
Faster-than-light wikipedia , lookup
Derivations of the Lorentz transformations wikipedia , lookup
Classical mechanics wikipedia , lookup
Jerk (physics) wikipedia , lookup
Four-vector wikipedia , lookup
Relativistic angular momentum wikipedia , lookup
Laplace–Runge–Lenz vector wikipedia , lookup
Seismometer wikipedia , lookup
Equations of motion wikipedia , lookup
Matter wave wikipedia , lookup
Rigid body dynamics wikipedia , lookup
Velocity-addition formula wikipedia , lookup
Classical central-force problem wikipedia , lookup
Transcript
2 February 2011 Physics 2200/2210 Exam 1 Class PIN Please give all your answers in 3 significant figures And remember units! Closed Book Equation Sheets Permitted (Unmarked) Non-programmed Calculators Permitted True/False The following questions are all true/false questions. Please Mark [a] on your Scantron sheet for true and [b] for false. 1) True or False? All objects have a center of mass. 2) True or False? The area under a velocity vs. time graph is the acceleration. 3) True or False? A ball is thrown up in the air and falls back to the level ground 10 sec. later. It reached its highest height at 5 sec. 4) True or False? If a bullet is fired from level ground at an angle of 35◦ above the horizontal, its initial velocity and final (“impact”) velocity are equal. 5) True or False? To three significant figures 0.00906499m is 9.06 × 10−2 m. Multiple Choice The following questions are multiple choice. Please mark the best choice on your Scantron sheet. 6) The velocity function of a particle is v(t) = 3kt3 . What are the units of k? (a) m s (c) m 2 (b) ms (d) m s4 ~ =? ~ is 5.12km west, and vector B ~ is 4.31km north, and C ~ =A ~ − B, ~ then C 7) If vector A (a) 0.81km (c) 6.69km (b) 2.76km (d) 9.43km 8) An inclined plane makes an angle of 37◦ with the ground. What is the acceleration due to gravity a block would feel along the inclined plane? (a) 4.38 sm2 (c) 7.38 sm2 (b) 5.90 sm2 (d) 7.83 sm2 9) On a graph of velocity vs. time, the motion of an object with a constant acceleration of 2 sm2 would appear as which? (a) an upward-sloping straight line. (c) an upward-cupped curve. (b) a horizontal line. (d) a downward-sloping straight line. 10) The adjacent graph describes the acceleration of a particle that starts at rest @ t = 0s. What is that particle’s velocity @ t = 10.0s? a(m/s2) 6 (a) 23.0 m s (b) 25.5 m s (d) t(s) 0 (c) 27.0 m s 2 31.5 m s -6 4 6 8 10 11) Vector Transformations (a) Bob throws a ball with a speed of 15.5 m/s at an angle of 25.0 degrees from the vertical. Draw a diagram, select x and y axes, and convert the polar vector for the ball to a Cartesian vector. (b) Alice skates on an ice rink with a velocity of (−5.25, 2.75) m/s. Convert this to a polar vector. 12) Tom fires a canon ball at an angle of 40.6 degree from the horizontal with a speed of 23.5 m/s. Tom’s cannon is standing 27.0 m in front of a building whose flat roof is 4.75 m above the ground. Calculate the horizontal distance from Tom at which the ball hits the roof.