Problem 12.CQ1P: A 1000-Ib boulder B is resting on a 200-Ib platform A when truck C accelerates to the left with a... Problem 12.CQ2P: Marble A is placed in a hollow tube, and the tube is swung in a horizontal plane causing the marble... Problem 12.CQ3P: The two systems shown start from rest. On the left, two 40-Ib weights are connected by an... Problem 12.CQ4P Problem 12.CQ5P: People sit on a Ferris wheel at points A, B, C, and D. The Ferris wheel travels at a constant... Problem 12.F1P: Crate A is gently placed with zero initial velocity onto a moving conveyor belt. The coefficient of... Problem 12.F2P Problem 12.F3P: Objects A, B, and C have masses mA, mB, and mCrespectively. The coefficient of kinetic friction... Problem 12.F4P: Blocks A and B have masses mAand mB, my respectively. Neglecting friction between all surfaces, draw... Problem 12.F5P: Blocks A and B have masses mAand mB, my respectively. Neglecting friction between all surfaces, draw... Problem 12.F6P: A pilot of mass m flies a jet in a half-vertical loop of radius R so that the speed of the jet, v,... Problem 12.F7P: Wires AC and BC are attached to a sphere that revolves at a constant speed v in the horizontal... Problem 12.F8P: A collar of mass m is attached to a spring and slides without friction along a circular rod in a... Problem 12.F9P: Four pins slide in four separate slots cut in a horizontal circular plate as shown. When the plate... Problem 12.F10P: At the instant shown, the length of the boom AB is being decreased at the constant rate of 0.2 m/s,... Problem 12.F11P Problem 12.F12P: Pin B has a mass m and slides along the slot in the rotating arm OC and along the slot DE which is... Problem 12.1P Problem 12.2P Problem 12.3P Problem 12.4P: A spring scale A and a lever scale B having equal lever arms are fastened to the roof of an... Problem 12.5P: A loading car is at rest on a track forming an angle of 25° with the vertical when a force is... Problem 12.6P: A 0.5-oz model rocket is launched vertically from rest at time t=0 with a constant thrust of 0.9 Ib... Problem 12.7P: Determine the maximum theoretical speed that may be achieved over a distance of 60 m by a car... Problem 12.8P: A tugboat pulls a small barge through a harbor. The propeller thrust minus the drag produces a net... Problem 12.9P: If an automobile's braking distance from 108 km/h is 75 m on level pavement, determine the... Problem 12.10P: A 4-kg package is released from rest at point A and travels down the conveyor shown Portions AB and... Problem 12.11P: The coefficients of friction the load and the flatbed trailer Shown s=0.40 and k=0.30 . Knowing that... Problem 12.12P: A light train made up of two cars is traveling at 90 km/h when the brakes are applied to both cars.... Problem 12.13P: The two blocks shown are originally at rest. Neglecting the masses of the pulleys and the effect of... Problem 12.14P: The two blocks shown are originally at rest. Neglecting the masses of the pulleys and the effect of... Problem 12.15P: Each of the systems shown is initially at rest. Neglecting axle friction and the masses of the... Problem 12.16P: Boxes A and B are at rest on a conveyor belt that is initially at rest. The belt is suddenly started... Problem 12.17P: A 5000-1b truck is being used to lift a 1000-1b boulder B that is on a 200-1b pallet A. Knowing the... Problem 12.18P: Block A has a mass of 40 kg, and block B has a mass of 8 kg. The coefficients of friction between... Problem 12.19P: Block A has a mass of 40 kg, and block B has a mass of 8 kg. The coefficients of friction between... Problem 12.20P Problem 12.21P Problem 12.22P: To unload a bound stack of plywood from a truck; the driver first tilts the bed of the truck and... Problem 12.23P: To transport a series of bundles of shingles A to a roof, a contractor uses a motor-driven lift... Problem 12.24P Problem 12.25P: Determine the maximum theoretical speed that a 1225 kg automobile starting from rest can reach after... Problem 12.26P Problem 12.27P: A spring AB of constant k is attached to a support at A and to a collar of mass m. The unstretched... Problem 12.28P Problem 12.29P Problem 12.30P: An athlete pulls handle A to the left with a constant force of P=100 N Knowing that after the handle... Problem 12.31P: A 10-Ib block B rests as shown on a 20-1b bracket A. The coefficients of friction are s=0.30 and... Problem 12.32P Problem 12.33P: Knowing that k=0.30 , determine the acceleration of each block when mA=5 kg, mB=30 kg, and mC=15 kg. Problem 12.34P: The 30-Ib block B is supported by the 55-Ib block A and is attached to a cord to which a 50-Ib... Problem 12.35P: Block B of mass 10 kg rests as shown on the upper surface of a 22-kg wedge A. Knowing that the... Problem 12.36P: Knowing that the swings of an amusement park ride form an angle of 40° with respect to the... Problem 12.37P: During a hammer thrower's practice swings, the 7.1-kg head A of the hammer revolves at a constant... Problem 12.38P Problem 12.39P: A single wire ACB passes through a ring at C attached to a sphere which revolves at a constant speed... Problem 12.40P: Two wires AC and BC are tied at C to a sphere that revolves at a constant speed v in the horizontal... Problem 12.41P Problem 12.42P Problem 12.43P: As part of an outdoor display, a 5-kg model C of the earth is attached to wires AC and BC and... Problem 12.44P: A 130-ib wrecking ball B is attached to a 45-ft-long steel cable AB and swings in the vertical arc... Problem 12.45P: During a high-speed chase, a 2400-Ib sports car traveling at a speed of 100 mi/h just loses contact... Problem 12.46P: An airline pilot climbs to a new flight level along the path shown. Knowing that the speed of the... Problem 12.47P: The roller-coaster track shown is contained in a vertical plane. The portion of track between A and... Problem 12.48P: A spherical-cap governor is fixed to a vertical shaft that rotates with angular velocity . When the... Problem 12.49P: A series of small packages, each with a mass of 0.5 kg, are discharged from a conveyor belt as... Problem 12.50P: A 55-kg pilot flies a jet trainer in a half vertical loop of 1200-m radius so that the speed of the... Problem 12.51P: A carnival ride is designed to allow the general public to experience high acceleration motion. The... Problem 12.52P Problem 12.53P Problem 12.54P Problem 12.55P: A 3-kg block is at rest relative to a parabolic dish which rotates at a constant rate about a... Problem 12.56P: A polisher is started so that the fleece along the circumference undergoes a constant tangential... Problem 12.57P Problem 12.58P: The carnival ride from Prob. 12.51 is modified so that the 80-kg riders can move up and down the... Problem 12.59P Problem 12.60P Problem 12.61P Problem 12.62P Problem 12.63P Problem 12.64P: A small 250-g collar C can slide on a semicircular rod which is made to rotate about the vertical AB... Problem 12.65P: A small 250-g collar C can slide on a semicircular rod which is made to rotate about the vertical AB... Problem 12.66P: An advanced spatial disorientation trainer allows the cab to rotate around multiple axes, as well as... Problem 12.67P Problem 12.68P: The 3-kg collar B slides on the frictionless arm AA'. The arm is attached to drum D and rotates... Problem 12.69P: A 0.5-kg block B slides without friction inside a slot cut in arm OA that rotates in a vertical... Problem 12.70P: Pin B weighs 4 oz and is free to slide in a horizontal plane along the rotating arm OC and along the... Problem 12.71P: The parasailing system shown uses a winch to let rope out at a constant rate so that the 70-kg rider... Problem 12.72P: A 700-kg horse A lifts a 50-kg hay bale B as shown. At the instant when r=8 m and =60 , the velocity... Problem 12.73P: Slider C has a weight of 0.5 Ib and may move in a slot cut in arm AB, which rotates at the constant... format_list_bulleted