# Exam-M10-1 - PHY 2048 Midterm Exam DAY Fall 2009 2 Use g = 9.80 m/s and G = 6.67 10-11 Nm2/kg2 1[15 points A mass M(837 kg is at the origin and a

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PHY 2048 Midterm Exam - DAY Fall 2009 Use g = 9.80 m/s and G = 6.67 × 10 -11 Nm 2 /kg 2 . 2 1. [15 points] A mass M (837 kg) is at the origin and a mass m (372 kg) is located at the point x = 0.055 m, y = 0.037 m as shown. (A) Find the magnitude of the gravitational force between mass M and mass m. (B) Specify the vector gravitational force of M on m using components. 2. [10 points] A motor in a 5.73 kg cart produces an acceleration of 0.387 m/s 2 when the cart is traveling at 2.87 m/s. Calculate the power being produced by the motor. 3. [20 points] Mass B (11.8 kg) is on a frictionless incline as shown, connected by a massless rope to mass A which is hanging from an ideal pulley. The incline is at 2 = 41.6° above horizontal. Find the mass of A so A accelerates upward at 2.06 m/s 2 . ( Sketch your free-body diagrams below. ) 4. [5 points] If you double the mass of an object and cut its speed in half, by what factor does the kinetic energy change? (Circle the correct answer.) A) 8 B) 4 C) 2 D) 1 E) 1/2 F) 1/4 G) 1/8 5. [20 points]

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A 5.37 kg cart is moving at 3.75 m/s at point A.
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## This note was uploaded on 12/30/2011 for the course PHY 2048 taught by Professor Laposky,e during the Fall '08 term at Tallahassee Community College.

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Exam-M10-1 - PHY 2048 Midterm Exam DAY Fall 2009 2 Use g = 9.80 m/s and G = 6.67 10-11 Nm2/kg2 1[15 points A mass M(837 kg is at the origin and a

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