Homework05 - miller(zdm77 – Homework05 – Chiu –(60180...

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Unformatted text preview: miller (zdm77) – Homework05 – Chiu – (60180) 1 This print-out should have 23 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points A block of mass m accelerates with accelera- tion g up a frictionless plane that is inclined at an angle α above the horizontal. The force F o that pushes the block is at an angle β above the horizontal. Find the force F o . m α β F o 1. mg 1 + sin α cos( α − β ) 2. mg sin β cos( α + β ) 3. mg 1 + sin β cos( α + β ) 4. mg 1 + sin β cos( α − β ) 5. mg 1 − sin β cos( α + β ) 6. mg 1 cos( α + β ) 7. mg 1 + sin β cos( β − α ) 8. mg 1 + sin α cos( α + β ) 9. mg 1 + sin α cos( β − α ) 10. mg 1 − sin β cos( β − α ) 002 (part 1 of 3) 10.0 points The suspended 2 . 9 kg mass on the right is moving up, the 2 . 6 kg mass slides down the ramp, and the suspended 7 . 7 kg mass on the left is moving down. The coefficient of friction between the block and the ramp is 0 . 14 . The acceleration of gravity is 9 . 8 m / s 2 . The pulleys are massless and frictionless. 2 . 6 k g μ = . 1 4 18 ◦ 7 . 7 kg 2 . 9 kg What is the acceleration of the three block system? Answer in units of m / s 2 . 003 (part 2 of 3) 10.0 points What is the tension in the cord connected to the 2 . 9 kg block? Answer in units of N. 004 (part 3 of 3) 10.0 points What is the tension in the cord connected to the 7 . 7 kg block? Answer in units of N. 005 10.0 points Assume: All surfaces, wheels, and pulley are frictionless. The inextensible cord and pulley are massless. m 1 m 2 F M Given M = 55 . 8 kg, m 1 = 4 . 84 kg, m 2 = 9 . 24 kg, and g = 9 . 8 m / s 2 . What horizontal force must be applied to the cart shown in the figure in order for the blocks to remain stationary relative to the cart? Answer in units of N....
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This note was uploaded on 09/30/2008 for the course PHY 303K taught by Professor Turner during the Fall '08 term at University of Texas.

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Homework05 - miller(zdm77 – Homework05 – Chiu –(60180...

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