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2. A tractor is speeding up at 1.2 m/s a 1700 kg sled with a rope at an angle between the sled and ground is 0.65. What is the tension in the rope? of 32. The coefficient of kinetic friction A) 16320N B) 10790 N C) 3315N D) 8370N E) 4420 N 3. Two ropes are attached to a 40 kg object. The rope with a $0 N force points along a direction 28° from the positive x- axis, and the other robe with a 90 N force points along a direction 210°. What is the acceleration of the object? A) 50.4 m/s B) 13.6 m/s C) 12 m/s D) 14.112 m/s E) 5.88 m/s 4. A roller coaster is moving at 45 m/s at the top of the first hill (h 53 m). Ignoring friction and air resistance, how fast will the roller coaster be moving at the top of a subsequent hill, which is 15 m? A) 65.2 m/s B) 71.55 m/s C) 6.75 ms D) 18.9 m/s E) 53 m/s
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