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**Unformatted text preview: **homework 05 – FONTENOT, BRIAN – Due: Feb 18 2008, 4:00 am 1 Question 1, chap 5, sect 5. part 1 of 2 10 points A child holds a sled on a frictionless, snow- covered hill, inclined at an angle of 26 ◦ . 8 7 N μ = F 26 ◦ If the sled weighs 87 N, find the force ex- erted on the rope by the child. Answer in units of N. Question 2, chap 5, sect 5. part 2 of 2 10 points What force is exerted on the sled by the hill? Answer in units of N. Question 3, chap 5, sect 5. part 1 of 2 10 points Consider the 634 N weight held by two cables shown below. The left-hand cable had tension T 2 and makes an angle of θ 2 with the ceiling. The right-hand cable had tension 440 N and makes an angle of 36 ◦ with the ceiling. The right-hand cable makes an angle of 36 ◦ with the ceiling and has a tension of 440 N . 634 N T 2 4 4 N 3 6 ◦ θ 2 a) What is the tension T 2 in the left-hand cable slanted at an angle of θ 2 with respect to the wall? Answer in units of N. Question 4, chap 5, sect 5. part 2 of 2 10 points b) What is the angle θ 2 which the left-hand cable makes with respect to the ceiling? Answer in units of ◦ . Question 5, chap 5, sect 6. part 1 of 3 10 points A block of mass 1 . 84572 kg lies on a friction- less table, pulled by another mass 3 . 62536 kg under the influence of Earth’s gravity. The acceleration of gravity is 9 . 8 m / s 2 . 1 . 84572 kg 3 . 62536 kg μ = 0 What is the magnitude of the net external force F acting on the two masses? Answer in units of N. Question 6, chap 5, sect 6. part 2 of 3 10 points What is the magnitude of the acceleration a of the two masses? Answer in units of m / s 2 . Question 7, chap 5, sect 6. part 3 of 3 10 points What is the magnitude of the tension T of the rope between the two masses? Answer in units of N. Question 8, chap 5, sect 6. part 1 of 2 10 points Two masses m 1 and m 2 are connected in the manner shown. homework 05 – FONTENOT, BRIAN – Due: Feb 18 2008, 4:00 am 2 m 2 m 1 T 1 T 2 a = g 2 The system is accelerating downward with acceleration of magnitude g 2 . Determine T 2 . 1. T 2 = 1 2 ( m 2- m 1 ) g 2. T 2 = parenleftbigg m 2- 1 2 m 1 parenrightbigg g 3. T 2 = parenleftbigg 1 2 m 2- m 1 parenrightbigg g 4. T 2 = m 2 g 5. T 2 = 1 2 m 2 g 6. T 2 = 3 2 m 2 g Question 9, chap 5, sect 6....

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