Consider the three boxes m₂=8.1 kg, m=10.6 kg and m=4.42 kg which are connected by massless cords passing over frictionless pulleys. The box m rests on a frictionless tabletop while box m and box mare suspended at the ends of the cords connected to box m. What is the magnitude of acceleration and direction of motion of box m when the system is released from rest? mb ma mc 2.53 meters per second squared, downward
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- 1 V:IV H.W.docx H.W: Two boxes are connected by a cord running over a pulley. The coefficient of kinetic friction between m, (5kg) and the table is 0.20. We ignore the mass of the cord and pulley and any friction in the pulley, which means we can assume that a force applied to one end of the cord will have the same magnitude at the other end. We wish to find the acceleration, a, of the system, which will have the same magnitude for both boxes assuming the cord doesn't stretch, As m (2Kg) move down, m,move to the right. m. د قوة الشد Tو تسارع النظام .a علما بأن البكرة مهملة الكتلة والاحتكاك؟ 出 1A hand tractor of mass 1000kg is attached by means of a horizontal, massless chain to a log whose mass is 400kg. The tension in the chain is 2000N, and the backward force of friction exerted by the ground on the log is 800N. How far will the log move in 3s, starting from rest? ANS. 3m/s², 13.5m.A 69.0 kg tightrope walker stands at the center of a rope. The rope supports are 10 m apart and the rope sags 11.0 ∘ at each end. The tightrope walker crouches down, then leaps straight up with an acceleration of 8.40 m/s2 to catch a passing trapeze. What is the tension in the rope as he jumps? Express your answer with the appropriate units.
- Q31 A 3 kg particle starts from rest and moves a distance of 4 m in 2 sec under the action of a single constant force. find the magnitude of the force ?A 2.00-kg object B is connected with a string to a 3.00-kgobject A, which is connected with a second string over a massless, frictionless pulley to a 8.00-kg object C. The strings have negligible mass and do not stretch, and the level tabletop is frictionless. Calculate the tension ?1. ?1= N Calculate the tension ?2. ?2= N Calculate the acceleration ? of the system. ?= m/s2Masses m₂, m₂, m3 and om are connected together as shown in the figure below. All the surfaces are smooth. If m₁ = 3.2kg, m₂ = 2.8kg, m3 = 3.8kg, om = 1.3kg and = 55°, calculate a) the acceleration of the system. b) the normal force between m3 and ōm. 7²1 7122 In+one 183
- A friction experiment is performed on a planet that has the same mass as Earth but half the radius. A 1.0-kg block is pulled along a horizontal dynamics track with a horizontal force of magnitude 15.0 N. If the coefficient of kinetic friction between the block and the track is 0.3, determine the acceleration of the block. O a. 14.26 m/s^2 O b. 12.06 m/s^2 O. 3.24 m/s^2 Od. 15.00 m/s^2A mysterious crate has shown up at your work . Forecracker company . Amd you are told to measure its inertia. It is too heavy to lift but it rools up smothly on casters .getting an inspiriation you light tape a 0.60kg iron block to the side of the crate , slide a fire cracker between the crate and the block and light the fuse . When the cracker explodes , the block goes in way and thecrate rolls the other way . You measure the crate's speed to be 0.064 m/s by timing how long it takes to cross floor tiles . You look at the specification s of the fire cracker and find that if releases 9J of energy. Thats all you need. And you quickly calculate the inertia of the crateA person pulls at an angle of 0 = 34.0° on three connected crates of masses m¡ = 25.0 kg, m2 = 18.0 kg, and Pull m3 = 15.0 kg over a smooth horizontal floor, as shown in A В the figure. The crates are connected to each other by m, m, m3 identical massless, horizontal strings A and B, each of which can support a maximum tension of 45.0 N before breaking. What is the magnitude F, of the largest pulling force that can be exerted without breaking either of the strings?
- H.W: Two blocks connected by a cord passing over a small frictionless pulley rest on frictionless plane, as in fig. below, (a)which way will the system move? (b)what is the acceleration of the block (c)what is the tension in the cord? Ans.(a) To left (b)0.65m/s² (c)43.37N N-100Neut. 7 ī N=50Neut my 50.10 Kg) m₂. 10.20 KgH.W Replace the loading system by an equivalent resultant force FR and couple moment MR, acting at point A. 40 N 30 N 2000 N m B 3 m 3 m 50 N9:58 PM Sun Feb 27 blackboard.albany.edu A 令74% O exactly as strong as the force of gravity on a 3-kg mass QUESTION 3 1 points A rocket is launched vertically from the Earth, and the thrust (pushing force) from the engines is directed upward, and has a magnitude of 5.00 x 106 N. The mass of the rocket is initially 2.00 x 10° kg. What is the initial acceleration of the rocket, assuming you can neglect air resistance? 25.0 m/s? 15.2 m/s2 O 7.6 m/s? 50.0 m/s2 1 points QUESTION 4 Click Save and Submit to save and submit. Click Save All Answers to save all answers. Sa Save All Answers