R14-6. The 50-lb load is hoisted by the pulley system and motor M. If the motor exerts a constant force of 30 lb on the cable, determine the power that must be supplied to the motor if the load has been hoisted s = 10 ft starting from rest. The motor has an efficiency of ɛ = 0.76. %3D
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- Determine the reactions at the wheels at the moment a worker applies a force of 350 N. P The mass of the hand truck is 65Kg. 60° 0.5 m Go 0.2 m -0.3 m 0.2 m- 0.4 mThe winding drun Dis drawing in the cable at an accelerated rate of 4 mv' Determine the cable tension if the suspended crate has a mass of 609 kgDetermine the spring stiffness K in N/m to maintain equilibrium of the scissors linkage. The linkage is subjected to a force of P = 800 N. The spring is un-stretched when initial angle θ0 = 10º. Neglect the mass of the links. Determine the spring stiffness k in N/m for equilibrium when θ = 65º.
- The 1200-lb homogeneous block is placed on rollers and pushed up the 10 incline at constant speed. Determine the force P and the roller reactions at A and B.Find the stable equilibrium position of the system described in Prob. 10.56 if m = 2.06 kg.The elevator E and its freight have a total mass of 400kg. Hoisting is provided by the motor M and the 150-kg block C. If the motor has an efficiency of ε =0.85, determine the power that must be supplied to themotor when the elevator is hoisted upwards at aconstant speed of VE = 4 m/s. Please show every single step of the process and the free body diagrams thanks
- Determine the force P required to maintain the 200-kg engine in the position for which = 30o. The diameter of the pulley at B is negligible ( take g=10 m/s2) e 2 m A B 2 m 200 kgTo apply work & energy equation 21 The 50 lb crate is given a speed of 10 ft/s in t = 4s starting from the rest. The motor has an efficiency e = 0.65. If the acceleration is con stant, determ ine the pow er that must be supplied to the motor when t= 2s. n eglect the mass of the pulley and cable. (P= Tv) 22The winch takes in cable at the constant rate of 105 mm/s. If the cylinder mass is 105 kg, determine the tension in cable 1. Neglect all friction. 2 1 105 kg
- Determine the force P required to maintain the 200-kg engine in the position for which e = 30o. The diameter of the pulley at B is * negligible ( take g=10 m/s2) 2 m B 2 m 200 kg P= 1893.7 N O P=1993.7 N O P= 1793.7 N O P= 1693.7 N O3-30. The 5-ft-long cord AB is attached to the end B of a spring having an unstretched length of 5 ft. The other end of the spring is attached to a roller C so that the spring remains horizontal as it stretches. If a 10-1b weight is suspended from B, determine the angle 8 of cord AB for equilibrium. 5 ft 5 ft A 8 5 ft B sesso k= 10 lb/ft CDetermine the tension Pin the cable which will give the 116-lb block a steady acceleration of 6.9 ft/sec2 up the incline. 23 116 lb Hz = 0.31 37° Answer: P = i Ib