Homework 5

Homework 5 - yindeemark(rry82 Homework 5 chelikowsky(59005...

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yindeemark (rry82) – Homework 5 – chelikowsky – (59005) 1 This print-out should have 23 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 (part 1 oF 2) 10.0 points A block oF mass m is accelerated across a rough surFace by a Force oF magnitude F that is exerted at an angle φ with the horizontal, as shown above. The Frictional Force on the block exerted by the surFace has magnitude f . f F φ m What is the magnitude oF the acceleration va oF the block? 1. | va | = F cos φ m 2. | va | = F m 3. | va | = F cos φ - f m 4. | va | = F - f m 5. | va | = F sin φ - m g m 002 (part 2 oF 2) 10.0 points Which oF the Following expressions For the coe±cient oF Friction is correct? 1. μ = f m g - F sin φ 2. μ = f m g - F cos φ 3. μ = m g - F cos φ f 4. μ = m g f 5. μ = f m g 003 10.0 points The suspended m 1 mass on the right is moving up, the m 2 mass slides down the ramp, and the suspended m 3 mass on the leFt is moving down. There is Friction between the block and the ramp, with the coe±cient oF the kinetic Friction μ . The acceleration oF gravity is g and the acceleration oF the three block system is a . The pulleys are massless and Frictionless. m 2 μ θ m 3 m 1 What is the equation oF motion oF the three- block system? 1. m 3 g + m 2 g (sin θ - μ sin θ ) - m 1 g = ( m 1 + m 2 + m 3 ) a 2. m 3 g + m 2 g (cos θ - μ sin θ ) - m 1 g = ( m 1 + m 3 ) a 3. m 3 g + m 2 g (cos θ - μ sin θ ) - m 1 g = ( m 1 + m 2 + m 3 ) a 4. m 3 g + m 2 g (sin θ - μ sin θ ) - m 1 g = ( m 1 + m 3 ) a 5. m 3 g + m 2 g (cos θ - μ cos θ ) - m 1 g = ( m 1 + m 3 ) a 6. m 3 g + m 2 g (1 - μ ) - m 1 g = ( m 1 + m 2 + m 3 ) a 7. m 3 g + m 2 g (sin θ - μ cos θ ) - m 1 g = ( m 1 + m 3 ) a 8. m 3 g + m 2 g (1 - μ ) - m 1 g = ( m 1 + m 3 ) a

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yindeemark (rry82) – Homework 5 – chelikowsky – (59005) 2 9. m 3 g + m 2 g (sin θ - μ cos θ ) - m 1 g = ( m 1 + m 2 + m 3 ) a 10. m 3 g + m 2 g (cos θ - μ cos θ ) - m 1 g
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Homework 5 - yindeemark(rry82 Homework 5 chelikowsky(59005...

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