14–71. The car C and its contents have a weight of 600 lb,whereas block B has a weight of 200 lb. If the car is releasedfrom rest, determine its speed when it travels 30 ft down the20° incline. Suggestion: To measure the gravitationalpotential energy, establish separate datums at the initialelevations of B and C.30 ft20°

Given data as per the question Weight of the car = 600 lb Weight of block b =200 lb

Answered: 14–71. The car C and its contents have…

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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Prob. 14-1 14-2. For protection, the barrel barrier is placed in front of the bridge pier. If the relation between the force and deflection of the barrier is F= (90(10%)x/2) Ib, where x is in ft, determine the car’s maximum penetration in the barrier. The car has a weight of 4000 Ib and it is traveling with a speed of 75 ft/s just before it hits the barrier. F(Ib)
The two springs are identical, withunstretched length 0.4 m. When the 150-kg mass issuspended at B, the length of each spring increases to0.6 m. What is the spring constant k?
19–58. The pendulum consists of a 10-lb solid ball and 4-lb rod. If it is released from rest when u0 = 0°, determine the angle u1 of rebound after the ball strikes the wall and the pendulum swings up to the point of momentary rest. Take e = 0.6. &
14-29 The train car has a mass of 10 Mg and is traveling at 5 m/s when it reaches A. If the rolling resistance is 1/100 of the weight of the car, determine the compression of each spring when the car is momentarily brought to rest
The spring is placed between the wall and the 10-kg block. If the block is subjected to aforce of F = 500 N, determine its velocity when s = 0.5 m. When s = 0, the block is at restand the spring is uncompressed. The contact surface is smooth.
Determine the K.E of a bike which is travelling at 16m/s having mass of 40kg .
The semicircular bar is smooth. The unstretched length of the spring is 0.250 m. The 6-N collarat A is given a downward velocity of 4 m/s, and when it reaches B the magnitude of its velocity is 12 m/s.Determine the spring constant k.
14-67. The assembly consists of two blocks A and B which have a mass of 20 kg and 30 kg, respectively. Determine the speed of each block when B descends 1.5 m. TI1c blocks are released from rest. Neglect the mass of the pulleys and cords
Determine the potential energy of the block that has a weight of 100 N.
The mass m = 5.0 kg resting on a frictionless horizontal table is connected to a horizontal spring with stiffness constant k = 170 N/m. The mass is pulled a distance to the right so that the spring is stretched a distance x0 = 1.3 mm initially, and then the mass is released from rest. e)? g)?
The spring constants are k1 = 140N / m, k2 = 240N / m and the unstretched lengths of the springs are 0.3 m. If the 6 kg ring is released from rest from point A, calculate its velocity when it reaches point B. According to the given datum line, the total potential energy (Ve) at point A is A = 1116.86 J and the total elastic potential energy (Ve) at point B is B = 370.8 J. Neglect the dimensions of the bracelet. (L1 = 0.90 m, L2 = 1.80 m, h1 = 1.20 m and h2 = 2.40 m)
A tugboat T having a mass of 19 Mg is tied to a barge B having a mass of 75 Mg. If the rope is "elastic" such that it has a stiffness of k=600kN/m, determine the maximum stretch in the rope during the initial towing. Originally both the tugboat and barge are moving in the same direction with speeds (vT)1= 15 km/h and (vB)1= 10 km/h, respectively. Neglect the resistance of the water.

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