Chapter 14, Problem 70P

The slotted arm OB rotates in a horizontal plane about point O of the fixed circular cam with constant angular velocity 0 = 10rad/s. The spring has a stiffness of 6.4 kN/m and is uncompressed when 80. The smooth roller A has a mass of 0.36 kg. Determine the normal force N which the cam exerts on A and also the force R exerted on A by the sides of the slot when 8 52°. The force R is positive if contact is with the lower surface. All surfaces are smooth. Neglect the small diameter of the roller. Answers: N= R= 0.19 m 0.19 m B 278.166820949951087 N N

The spring of constant k is unstretched when the slider of mass m passes position B. If the slider is released from rest in position A, determine its speed as it passes points B and C. What is the normal force exerted by guide on the slider at position C? d tion B Slider TAT 18* & quide

The slotted arm OA rotates about a fixed axis through O. At the instant under consideration, 0 = 35%, 0 = 39 deg/s, and Ö = 15 deg/s². Determine the magnited of the force F applied by arm OA and the magnitude of the force N applied by the sides of the slot to the 0.2- kg slider B. Neglect all friction, and let L = 0.68 m. The motion occurs in a vertical plane. 0 -L B m

The motor M is at rest when someone flips a switch and it starts pulling in the rope. The acceleration of the rope is uniform and such that it takes 0.50 s to achieve a retraction rate of 7.00 ft/s. Determine the tension in the rope during initial 0.50 s. The cargo C weighs 2576 lb., the weight of the ropes and pulleys is negligible, and friction in the pulleys is negligible. Note: answer to be in pounds (Ib). motor M cargo C

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The 3.5-Mg engine is suspended from a spreader beam AB having a negligible mass and is hoisted by a crane which gives it an acceleration of 4 m/s? when it has a velocity of 2 m/s. Determine the force (kN) in chains CA and CB during the lift. Draw the FBD for the entire system and the FBD for the chains connected to A, B, and C. Show all necessary math and include all units. 60°

Q2/ The 1-kg slider starts from rest at position 1 and it moves up the incline under the action of constant force P = 55 N cause the slider to have a speed v2 = 0.5 m/s at position 2. Neglect friction, and determine the spring constant k. Take the angle 0 = 18°. 200 mm 200 mm 250 mm 250 mm

The smooth block B, having a mass of 1 kg, is attached to the vertex of the right circular cone using a light cord. If the block has a speed of 0.6 m/s around the cone, determine the tension in the cord and the reaction which the cone exerts on the block. Neglect the size of the block. 200 mm 400 mm 300 mm

The crate B and cylinder A have a mass of 213 kg and 75 kg, respectively. If the system is released from rest, find the tension in the cable when t = 3 s. Neglect the mass of the pulleys. Give your answer in Newtons (N). B