MT1clicker practice

ta mana70kg 1 2 3 4 5 6 0n 200n 700n 900n manb90kg

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Unformatted text preview: 0 N 0% 0% 5o Frictionless pulley ll 40 1000 N Robert now uses two pulleys to lift the 1000 N weight just a little off the ground as shown. With what force does he have to pull down on the rope attached to the smaller pulley to hold the box off the ground? Ceiling Ceiling Frictionless pulley Frictionless 0 of 30 N 1000 N ve 0% Ab o N on e of th e 20 15 pulley 0% 00 N 0% 00 N 0% 00 N 10 0 50 25 0 N N 0 N 250 N 500 N 1000 N 0% 0% 0% 1500 N 2000 N None of the Above 0 1. 2. 3. 4. 5. 6. 7. 40 Man A (70kg) and Man B (90kg) are hanging motionless from a roof. What is the tension, TA, in the top rope? (Assume the ropes are massless and use g = 10 m/s2.) TA Man A: 70 kg 1. 2. 3. 4. 5. 6. 0 N 200 N 700 N 900 N Man B: 90 kg 1600 N None of the Above TB 17% 17% 17% 17% 17% 17% 0 of 5 of 40 If you cut the rope between Man A and Man B so that Man A stays motionless, what is the tension, TA, in the top rope? (Assume the ropes are massless and use g = 10 m/s2. Ignore any oscillations resulting from cutting the rope.) TA Man A: 70 kg 1. 2. 3. 4. 5. 6. 0 N 200 N 700 N 900 N 1600 N None of the Above 0 of 5 Man B: 90 kg 40 0% 0% 0% 0% 0% 0% If you cut the rope between Man A and the roof, what is the tension, TB, in the bottom rope? (Assume the ropes are massless and use g = 10 m/s2. Ignore any oscillations resulting from cutting the rope) 1. 2. 3. 4. 5. 6. 0 N 200 N 700 N 900 N 1600 N None of the Above Man A: 70 kg TB Man B: 90 kg 0 of 5 40 0% 0% 0% 0% 0% 0% Man A (70kg) and Man B (90kg) are hanging motionless from a platform at rest. What is the tension, TA, in the top rope if the platform accelerates upward at a constant rate of 2 m/s2? (Assume the ropes are massless and use g = 10 m/s2.) a = 2m/s2 TA 11% 11% 11% 11% 11% 11% 11% 11% 11% Man A: 70 kg TB Ab . th e of e .. N N 19 20 N N 40 No n 17 40 16 00 90 0 N 84 0 N 70 0 20 0 Man B: 90 kg N 0 of 5 of N 0 N 200 N 700 N 840 N 900 N 1600 N 1740 N 1920 N None of the Above 0 1. 2. 3. 4. 5. 6. 7. 8. 9 A 50 kg person stands on a 25 kg platform. He pulls on the rope that is attached to the platform via the frictionless pulley system shown below. With what force does he have to pull on the rope to move the platform up at a steady rate? (Ignore friction and assume g = 10m/s2) 12% 12% 12% 12% 12% 12% 12% 12% 50 kg 40 2 N et er m in e N 50 N 75 N N 25 0 50 0 N 0 of 30 62 5 25 kg N 750 N 625 N 500 N 250 N 75 N 50 N 25 N Impossible to determine 75 0 1. 2. 3. 4. 5. 6. 7. 8. A 50 kg person stands on a 25 kg platform. Another man on the ground pulls on the rope that is attached to the platform via the frictionless pulley system shown below. With what force does he have to pull on the rope to move the platform up at a steady rate? (Ignore friction and assume g = 10m/s2) 1. 2. 3. 4. 5. 6. 7. 8. 750 N 625 N 500 N 375 N 250 N 75 N 50 N 25 N 12% 25 kg 12% 12% 12% 12% 12% 12% 12% 50 kg 40 0 of 30...
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This note was uploaded on 01/20/2014 for the course PHYSICS 131H taught by Professor Ralf during the Fall '10 term at Ohio State.

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