A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.18 and the push imparts an initial speed of 3.9 m/sm/s ? Express your answer to two significant figures and include the appropriate units.
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A box is given a push so that it slides across the floor.
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- An object with mass m = 34 kg is pushed with 452 N of force to be moved across a distance of 4.6 m on a surface with friction. Initially the object is moving at vi = 0.82 m/s and after being moved across 4.6 m, the final speed is 2.5 m/s. What is the magnitude of the frictional force acting on the object in the unit of N?You push a box (mass 3 kg) so that its initial speed is 2.2 m/s. It slides across a rough floor (coefficient of kinetic friction 0.48). How far will it slide before it stops? Give your answer in m and report your answer to 2 decimal places.A desperate hiker has to think fast to help his friend who has fallen below him. Quickly, he ties a rope to a rock of mA = 405 kg and makes his way over the ledge (see the figure below). If the coefficient of static friction between the rock and the ground is H=0.348, and the mass of the hiker is ma= 70.1 kg, what is the maximum mass of the friend, mc, that the rock can hold so the hikers can then make their way up over the ledge? Assume the rope is parallel to the ground and the point where the rope passes over the ledge is frictionless. (ANS: 70.8 kg)
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- A desperate hiker has to think fast to help his friend who has fallen below him. Quickly, he ties a rope to a rock of mass ma and makes his way over the ledge (see the figure). If the coefficient of maximum static friction between the rock and the ground is µ, and the mass of the hiker is mâ, what is the maximum mass of the friend, mc, that the rock can hold so the hikers can then make their way up over the ledge? Assume the rope is parallel to the ground and the point where the rope passes over the ledge is frictionless. mc = JuAn object with a mass of 1.58 kg is initially at rest upon a horizontal, frictionless surface. An applied force of 4.79 N i acts on the object for 2.94 s. What is the object's final speed? Enter a number rounded to 2 decimal places and assume the answer has proper SI Units.A small box of mass m₁ is sitting on a board of mass m₂ and length L (Figure 1). The board rests on a frictionless horizontal surface. The coefficient of static friction between the board and the box is μg. The coefficient of kinetic friction between the board and the box is, as usual, less than μg. Throughout the problem, use g for the magnitude of the free-fall acceleration. In the hints, use f for the magnitude of the friction force between the board and the box. igure m₁ m₂ L F 1 of 1 Find Fmin, the constant force with the least magnitude that must be applied to the board in order to pull the board out from under the the box (which will then fall off of the opposite end of Express your answer in terms of some or all of the variables μs, m₁, m2, g, and L. Do not include f in your answer. ► View Available Hint(s) Π| ΑΣΦ Fmin = Submit Provide Feedback ? board). Activate Windows Go to Settings to activate Wi