Two packages at UPS start sliding down the 20∘ ramp shown in the figure. Package A has a mass of 3.00 kg and a coefficient of kinetic friction of 0.220. Package B has a mass of 12.0 kg and a coefficient of kinetic friction of 0.170. How long does it take package A to reach the bottom?
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Two packages at UPS start sliding down the 20∘ ramp shown in the figure. Package A has a mass of 3.00 kg and a coefficient of kinetic friction of 0.220. Package B has a mass of 12.0 kg and a coefficient of kinetic friction of 0.170.
How long does it take package A to reach the bottom?
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- The figure shows two 1.00kg blocks connected by a rope. A second rope hangs beneath the lower block. Both ropes have a mass of 250g . The entire assembly is accelerated upward at 5.5m/s2 by force F. What is the tension at the bottom of rope 1?You are lowering two boxes, one on top of the other, down the ramp shown in the figure by pulling on a rope parallel to the surface of the ramp. Both boxes move together at a constant speed of 15.0 cm/s. The coefficient of kinetic friction between the ramp and the lower box is 0.486, and the coefficient of ▶ ▶ ▼ static friction between the two boxes is 0.823. You may want to review (Page) For help with math skills, you may want to review: Resolving Vector Components Calculating Trigonometric Function Values For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Toboggan ride with friction II. Part A Part B Part C 32.0 kg 48.0 kg IVE ΑΣΦ T= 356 4.75 m What force T do you need to exert to accomplish this? Express your answer in newtons. ► View Available Hint(s) 2.50 m ? NA heavy sled is being pulled by two people, as shown in the figure. The coefficient of static friction between the sled and the ground is µs 0.603, and the kinetic friction coefficient is Hk = 0.419. The combined mass of the sled and its load is m = 336 kg. The ropes are separated by an angle o = 22.0°, and they make an angle 0 31.1° with the horizontal. %3D Assuming both ropes pull equally hard, what is the minimum rope tension required to get the sled moving? minimum rope tension: N If this rope tension is maintained after the sled starts moving, what is the sled's acceleration? acceleration: m/s?
- You are out on a hike and come across an unfortunate scene: a fellow hiker has fallen off a ledge. You happen to be carrying a long rope, and bravely decide to help. You tie the rope to a rock of mass mR=500 kgmR=500 kg and make your way over the ledge (see figure). If the coefficient of static friction between the rock and the ground is μS=0.355μS=0.355, and your mass is mH=70.5 kgmH=70.5 kg, what is the maximum mass of the fallen hiker (mFmF) that the rock can hold so that you two can make it back up from the ledge? Assume that where the rope passes the ledge is frictionless and that the rope is parallel to the ground.Consider a wooden ramp angled 30.1 degrees above horizontal. If a 10.2-kg wooden block is given a strong shove up the ramp so that it has an initial velocity of 28.6 m/s, how long (in seconds) will it take the block to reach its maximum height (before it starts sliding down)? The coefficient of kinetic friction between the block and the ramp is 0.410.A block is placed on a wooden plank, which is initially horizontal. One end of the plank is slowly raised to make it more and more inclined, and for a while the block stays in place on the plank and doesn't slide due to static friction. Finally, when the plank reaches an incline of 56.3oabove horizontal, the block begins to slide. What is the coefficient of static friction between the block and the plank?
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