16-79. The mechanism shown is used in a rivetingmachine. It consists of a driving piston A, three links, and ariveter which is attached to the slider block D. Determinethe velocity of D at the instant shown, when the piston at Ais traveling at va = 20 m/s.45°150 mm300 mmVA = 20 m/s+45°200 mm30°160°45°

Given: The velocity at point A is vA=20 m/s The length of the CD is CD=0.15 m. The length of AC is…

Answered: 16-79. The mechanism shown is used in a…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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15-23. The motor exerts a force F on the 40-kg crate a shown in the graph. Determine the speed of the crate when t= 3 s and when t = 6 s. When t = 0, the rate is moving downward at 10 m/s
The cord, which is wrapped around the disk, is given an acceleration of a(t) =(10t) m/s 2 , where t is in seconds. Starting from rest, determine the angular displacement, angularvelocity, and angular acceleration of the disk when t = 3 s.
When θ = 15°, the car has a speed of 50 m/s which is increasing at 6 m/s^2. Determine the angular velocity of the camera tracking the car at this instant.
Due to slipping, points A and B on the rim of the disk have the velocities vA = 4.2 ft/s and vB = 8.4 ft/s. Determine the velocity of the center point C and point D at this instant.
The car A has a forward speed of 18 km/h and is accelerating at 2.7 m/s2. Determine the velocity and acceleration of the car relative to observer B, who rides in a nonrotating chair on the Ferris wheel. The angular rate Ω = 2.3 rev/min of the Ferris wheel is constant.
The 0.75-lb smooth can is guided along thecircular path using the arm guide. If the arm has anangular velocity θ’= 2 rad./s, and an angular acceleration θ’’= 0.4 rad./s2, at the instantθ= 30°, determine the force ofthe guide on the can. Motion occurs in the horizontal plane.
The uniform rods AB and BC weigh 2.4 kg and 4 kg, respectively, and the small wheel at C is of negligible weight. If the wheel is moved slightly to the right and then released, determine the velocity of pin B after AB has rotated through 90°.
The hoisting system shown is used to easily raise kayaks for overhead storage. Determine the velocity and acceleration of the kayak (positive if upward, negative if downward) when y = 80 in. if the winch M reels in cable at the constant rate l˙l˙ = 8 in./sec. Assume that the kayak remains level. The distance b = 52 in.
The double pulley consists of two wheels which are attached to one another and turn at the same rate. The pulley has a mass of 32 kg and a radius of gyration k_O = 260 mm. The men A and B have a mass of 60 kg and 70 kg, respectively. Assume they do not move relative to the rope during the motion. Neglect the mass of the rope. If two men A and B grab the suspended ropes and step off the ledges at the same time, determine the speed of man A in 4.2 s starting from rest. vA= ??? If two men A and B grab the suspended ropes and step off the ledges at the same time, determine the speed of man B in 4.2 s starting from rest. vB= ???
Rotation of bar OA is controlled by the lead screw which imparts a horizontal velocity v = 31 mm/s to collar C and causes pin P to travel along with the smooth slot. The velocity of collar C is decreasing at a rate of 5 mm/s2 at the instant in question. Determine the values of r¨ and θ¨, where r = OP, if h = 245 mm and x = 185 mm.
The cord, which is wrapped around the disk, is given an acceleration of a=(12t)m/s2, where t is in seconds A) Starting from rest, determine the angular displacement of the disk, measured clockwise, when t = 3 s B) Starting from rest, determine the angular velocity of the disk, measured clockwise, when t = 3 s C) Starting from rest, determine the angular acceleration of the disk, measured clockwise, when t = 3 s .
The hoisting system shown is used to easily raise kayaks for overhead storage. Determine the velocity and acceleration of the kayak (positive if upward, negative if downward) when y = 66 in. if the winch M reels in cable at the constant rate l˙ = 9 in./sec. Assume that the kayak remains level. The distance b = 56 in.

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