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Unformatted text preview: PHY 131.05 Midterm Exam2 NAME: Thursday, March 1, 2007 Exam duration: 75 minutes Grading: Q.1Q.2Q.3Q4Total /36/20/32/28 Useful formulas: Position, velocity, and acceleration: ~v = d~ r dt (1) ~a = d~v dt (2) Acceleration due to gravity: g = 9 . 80 m/s 2 (3) Centripetal acceleration: a = v 2 r (4) Kinematics Equations: ~v ( t ) = ~v + ~at (5) ~ r ( t ) = ~ r + ~v t + 1 2 ~at 2 (6) Dynamics Equations: ~ F = m~a (7) Work: dW = ~ F.d~s (8) Kinetic energy of a particle with mass m: K = 1 2 mv 2 (9) 1 Work kinetic energy theorem: W = K (10) Gravitational potential energy: U ( y ) = mgy (11) Elastic potential energy: U ( x ) = 1 2 kx 2 (12) Momentum: p = mv (13) Impulse momentum theorem: I = Z Fdt = p (14) 2 Figure 1: Figure for Question 1. 1 Force exerted on an object The graph shows the net force exerted on a 0.5 kgobject as it moves from x = 0 to x = 8 . 0 m. The object starts moving from rest.0 m....
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 Winter '07
 n/a
 Physics, Acceleration, Gravity

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