Physics 15200- HW8

Physics 15200- HW8 - 47 and kinetic Friction between the...

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lai (yl8859) – HW08 – Ross – (15200) 1 This print-out should have 5 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points The magnitude of each force is 240 N, the force on the right is applied at an angle 35 and the mass of the block is 20 kg. The coefficient of friction is 0 . 276. The acceleration of gravity is 9 . 8 m / s 2 . 20 kg μ = 0 . 276 240 N 35 240 N What is the magnitude of the resulting ac- celeration? Answer in units of m / s 2 . 002 (part 1 of 2) 10.0 points Two blocks are attached by a thin inextensi- ble string over a frictionless, massless pulley. There is a frictional force between the block on the incline and the incline. The acceleration of gravity is 9 . 8 m / s 2 . 15 kg 17 kg μ T 2 . 3 m / s 0 m / s 2 26 Calculate the magnitude of the frictional force acting on the block on the incline. Answer in units of N. 003 (part 2 of 2) 10.0 points Calculate the coefficient of friction. 004 10.0 points The static friction between the two blocks is
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Unformatted text preview: . 47 and kinetic Friction between the block with mass 7 . 5 kg and the horizontal surFace is . 33 . The acceleration oF gravity is 9 . 8 m / s 2 . 7 . 5 kg . 2 kg F 9 8 m = 0 47 μ = 0 . 33 What is the minimum Force F which must be exerted on the 7 . 5 kg block in order that the 0 . 2 kg block does not to Fall? Answer in units oF N. 005 10.0 points A high-speed test track For cars has a curved section — an arc oF a circle oF radius R = 762 m. The curved section is banked at angle θ = 12 . 1 ◦ From the horizontal to help the cars to stay in the road while moving at high speeds. The acceleration oF gravity is 9 . 8 m / s 2 . r SIDE VIEW TOP VIEW θ One day, oil spills on the track making a Few meters oF the curved section Frictionless. Calculate the speed v oF a car which can cross the oil spill oF the curve without slipping side-ways. Answer in units oF m / s....
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