The system is released from rest in the position shown. Calculate the tension T in the cord and the acceleration a (positive if to the right, negative if to the left) of the 30-kg block. The small pulley attached to the block has negligible mass and friction. (Suggestion: First establish the kinematic relationship between the accelerations of the two bodies.) 6 4 Hs = Hk = μ = 0.42 30 kg 28 kg

The spring-mounted 0.82-kg collar A oscillates along the horizontal rod, which is rotating at the constant angular rate À = 9.1 rad/s. At a certain instant, r is increasing at the rate of 850 mm/s. If the coefficient of kinetic friction between the collar and the rod is 0.56, calculate the friction force F exerted by the rod on the collar at this instant. Vertical 0 Answer: F= i Attempts: 0 of 3 used Submit Answer eTextbook and Media Save for Later N

The slender bar AB with a mass of 60 kg and a length of 4 m is secured by a cable at C, and pivoted to the back of a truck at A. When the truck starts from rest creating an acceleration of 5 m/sec² on the bar in the direction of the arrow, calculate the magnitude of the tension in the cable. Present your answer in Newtons using 3 significant figures. В. 4 m 60° A -2 m

The homogeneous cylinder A has a mass of 80 kg, and the mss of the hub can be neglected. The magnitude of the variable force P, is in newtons when t is in sec- onds. The velocity of body B changes from 2 m/s downward when t = 0 to 4 m/s downward t = 5 s. Determine the mass of B. Solve all questions using Impulse and Momentum methods