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A kicking-simulation attachment goes on the front of a wheelchair, allowing athletes with mobility impairments to play soccer. The athletes load up the spring shown through a ratchet
Fig. P13.196
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VECTOR MECH. FOR EGR: STATS & DYNAM (LL
- C14-2. As the large ring rotates, the operator can apply a breaking mechanism that binds the cars to the ring, which then allows the cars to rotate with the ring. Assuming the passengers are not belted into the cars, determine the smallest speed of the ring (cars) so that no passenger will fall out. When should the operator release the brake so that the cars can achieve their greatest speed as they slide freely on the ring? Estimate the greatest normal force of the seat on a passenger when this speed is reached. Use numerical values to explain your answer.arrow_forwardPlease respond as quickly as possible, USE THE DATA SHOWN IN THE TABLE. Distances are in centimeters The mechanism shown is used to carry out experimental tests on different industrial springs that are placed between the wall and point A. The rigid reinforcement that holds the spring at A moves through the horizontal beam by means of the 4 frictionless rollers. The piston CD is compressed by stretching the spring at A. For the situation in the position shown the spring is stretched a distance s and has an elongation constant of 2000N / m. The weight of the system can be considered negligible. Determine: 1.The magnitude of compressive force exerted by the piston at the position shown. 2.The magnitude of the force experienced by the bolt at E.arrow_forwardThe simple 2.3-kg pendulum is released from rest in the horizontal position. As it reaches the bottom position, the cord wraps around the smooth fixed pin at B and continues in the smaller arc in the vertical plane. Calculate the magnitude of the force R supported by the pin at B when the pendulum passes the position 8 = 43° 330 mm 2.3 kg B Answer: R= i 90° 720 mm Narrow_forward
- On a sloping road, the driver of the 1.3-tonne car, with an almost constant 300 N thrust from its engine, brakes at point A while driving at 90 km/h.a- Calculate the kinetic friction coefficient of the road to stop by traveling 50 m.b- Calculate the stopping distance (using the kinetic friction coefficient you found in part a) when you apply the brakes while going downhill at the same speed from B to A.arrow_forwardThe figure shows the cross section of a garage door which is a uniform rectangular panel 7.3 ft by 7.3 ft and weighing 236 lb. The door carries two spring assemblies, one on each side of the door, like the one shown. Each spring has a stiffness of 71 lb/ft and is unstretched when the door is in the open position shown. If the door is released from rest in this position, calculate the velocity of the edge at A as it strikes the garage floor. omwmwwww B 7.3' 9.2' 7.3' Answer: VA = i ft/secarrow_forwardThe 10-lb sultcase slides down the curved ramp for which the coefficient of kinetic friction is 4 = 0.2. At the instant it reaches point A it has a speed of 5 ft/s. Suppose that [= 5 ft. (Figure 1) Figure 1 of 1 Determine the normal force on the suitcase. Express your answer to three significant figures and include the appropriate units. N = Value Submit Part B Request Answer = Value Submit Determine the rate of increase of its speed. Express your answer to three significant figures and include the appropriate units. Units Request Answer Units ? < Return to Assignment Provide Feedback ?arrow_forward
- In the system that starts to move without speed, the masses of 22.2 kg each reach an angular velocity of 242 rev/min in t second at a radius of R=293 mm with the effect of the 37 N force T. Since the radius of the pulley is r = 63 mm, find t ignoring friction and all masses except the four.arrow_forwardThe torsional spring has a stiffness of 20 N-m/rad and is undeflected when the 3-kg uniform slender bar is in an upright position. If the bar is released from rest in the horizontal position shown, find its angular velocity as it passes the vertical position. Neglect friction effects. 4 Type here to search ThinkVision K - Pan Tab Cape Look Esc Q A Z G FT W S # ONDA 3 F2 E D A $ 4 R F 5 F4 T G XCVB 8 a Y H N P6 F6 U J M F7 K ( F8 F10 F11 +Backspace Enter T F12 Shift Print Screen SysRq Insert 0.5 m Scroll Lock Delete Home Break End Page Up Page Down Naam Lock K 37°F Cloudy Home Lenovo B 20arrow_forward3. In the diagram below, a force P of 750 N is applied to the 350 kg block. Find the acceleration of the block and the reaction forces at contact points A and B if the coefficient of kinetic friction between the block and surface is 0.15. 700 mm 700 mm 300 mm 300 mm 400 mm 500 mm'500 mmarrow_forward
- The 2-lb collar is released from rest at A and slides freely down the inclined rod, striking the stop at B with a velocity v. The spring of stiffness 1.6 lb/ft has an unstretched length of 13 inches. a) Calculate the velocity v, b) if u-0.1, calculate the work done by the friction between the rod and the collar, recalculate the speed and efficiency. A k = 1.60 lb/ft 18". Figura 8 wwwww B 20" 10"arrow_forwardThe cylindrical peg has a mass m and is confined to move along the smooth horizontal slot due to the rotation of the lever arm. (The figure shows the system as seen from above.) The angular rotation of the lever arm is e(t), wheret is in seconds. Obtain the equations of motion for the peg. r(0)arrow_forwardThe system consists of the two smooth spheres, each weighing 8 lb and connected by a light spring, and the two bars of negligible weight hinged freely at their ends and hanging in the vertical plane. The spheres are confined to slide in the smooth horizontal guide. If a horizontal force F = 23 lb is applied to the one bar at the position shown, what is the acceleration of the center C of the spring? Does the result depend on the dimension b? Assume d = 17 in. Answer: a = i b F ft/sec²arrow_forward
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