14-69. The 5-kg collar has a velocity of 5 m/s to the rightwhen it is at A. It then travels along the smooth guide.Determine its speed when its center reaches point B and thenormal force it exerts on the rod at this point. The spring hasan unstretched length of 100 mm and B is located just beforethe end of the curved portion of the rod.- 200 mmwww200 mmk = 50 N/m

Answered: Image /qna-images/answer/18d6e510-a3de-4143-9c83-ced46c205424.jpg

Answered: 14-69. The 5-kg collar has a velocity…

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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18-66. The end A of the garage door AB travels along the horizontal track, and the end of member BC is attached to a spring at C. If the spring is originally unstretched, determine the stiffness k so that when the door falls downward from rest in the position shown, it will have zero angular velocity the moment it closes, i.e., when it and BC become vertical. Neglect the mass of member BC and assume the door is a thin plate having a weight of 200 Ib and a width and height of 12 ft. There is a similar connection and spring on the other side of the door. 12 ft B 5 ft 15 5t 7 ft 2 ft 6 ft 'D
17-35. The sports car has a mass of 1.5 Mg and a center of mass at G. Determine the shortest time it takes for it to reach a speed of 80 km/h, starting from rest, if the engine only drives the rear wheels, whereas the front wheels are free rolling. The coefficient of static friction between the wheels and the road is µs wheels for the calculation. If driving power could be supplied to all four wheels, what would be the shortest time for the car to reach a speed of 80 km/h? 0.2. Neglect the mass of the G 0.35 m В -1.25 m- -0.75 m
19-23. The hoop (thin ring) has a mass of 5 kg and is released down the inclined plane such that it has a backspin w = 8 rad/s and its center has a velocity vg = 3 m/s as shown. If the coefficient of kinetic friction between the hoop and the plane is µr = 0.6, determine how long the hoop rolls before it stops slipping. w = 8 rad/s vG = 3 m/s 0.5 m 30°
4 m M = (30t²) N•m F = 15t N. If the rod of negligible mass is subjected to a couple moment of M=29t2 N;M where t is the time in seconds, and the engine of the car supplies a braking force F= 15t N to the wheels, determine the speed of the car at t= 8s. The car at t=0s a a speed of 7 m/s. The total mass of the car and the driver is 158 kg. Neglect the size of the car.
15-51. The 30-Mg freight car A and 15-Mg freight car B are moving towards each other with the velocities shown. Determine the maximum compression of the spring mounted on car A. Neglect rolling resistance
None
17-35. The sports car has a mass of 1.5 Mg and a center of mass at G. Determine the shortest time it takes for it to reach a speed of 80 km/h, starting from rest, if the engine only drives the rear wheels, whereas the front wheels are free rolling. The coefficient of static friction between the wheels and the road is u, wheels for the calculation. If driving power could be supplied to all four wheels, what would be the shortest time for the car to reach a speed of 80 km/h? 0.2. Neglect the mass of the G 0.35 m A -1.25 m- В -0.75 m
The 61-lb crate slides down the curved path in the vertical plane. If the crate has a velocity of 6.8 ft/sec down the incline at A and a velocity of 23.5 ft/sec at B, compute the work Uf done on the crate by friction during the motion from A to B. 16' Answer: Uf = i 496.7 ft-lb 6.8 ft/sec 25' B 23.5 ft/se
14-76. The 4-kg smooth collar has a speed of 3 m/ s when it is at s = 0. Determine the maximum distance s it travels before it stops momentarily. The spring has an unstretched length of l m
The collar has a mass of 28-kg and slides along the smooth rod. Two springs are attached to it and the ends of the rod as shown. S kA kB: 12 0.25 m Each spring has an uncompressed length of I1=2-m and l2=3-m and stiffnesses k1=51-N/m and k2=176-N/m respectively. Determine the velocity that must be subjected to the collar to generate a compression of 0.7 m
13-85. The spring-held follower AB has a weight of 0.75 lb and moves back and forth as its end rolls on the contoured surface of the cam, where r= 0.2 ft and z = (0.1 sin 20) ft. If the cam is rotating at a constant rate of 6 rad/s, determine the force at the end A of the follower when 0 = 45°. In this position the spring is compressed 0.4 ft. Neglect friction at the bearing C. z = 0.1 sin 20 0.2 ft B ở = 6 rad/s A k= 12 lb/ft
The 750-mm-long spring is compressed by the plate P, which can slide freely on the 600- mm-long vertical bars. The 55.6-kg block is given a velocity of v = 5 m/s when it is x = 2 m above the plate. Determine how far the plate travels down when the block stops momentarily after hitting it. Neglect the mass of the plate. v = 5 m/s P k = 25 kN/m- A h = 2m 600 mm

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