15-83. The 10-lb collar B is at rest, and when it is in theposition shown the spring is unstretched. If another 1-lbcollar A strikes it so that B slides 4 ft on the smooth rodbefore momentarily stopping, determine the velocity of Ajust after impact, and the average force exerted between Aand B during the impact if the impact occurs in 0.002 sThe coefficient of restitution between A and B is e=0.5.k = 20 lb/ft ?3 ft

Given Data: The weight of collar A is wA = 1 lb. The weight of collar B is wB = 10 lb. The…

Answered: 15-83. The 10-lb collar B is at rest,…

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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The 2.3-lb collar slides with negligible friction on the fixed rod in the vertical plane. If the collar starts from rest at A under the action of the constant 3.1-lb horizontal force, calculate its velocity v as it hits the stop at B. 31" Answer: VB- 58" 3.1 lb B ft/sec
Freight car A of mass m is rolling to the right when it collides with freight car B of mass 1.62m initially at rest. If the two cars are coupled together at impact, find the fractional loss of energy n during the collision. B Answer: n = the tolerance is +/-2%
4. The block of 2 kg travels down the slope from rest from the position shown and strikes the spring of constant k = 2 kN/m. Determine the maximum deformation of the spring after it is struck by the block. Also determine the location of the block relative to the free end of the spring when it stops after being bounced back by the spring. The coefficient of kinetic friction between the block and surfaces is μ = 0.25. www. 2 m 2 m 4 3
6. At a given instant the 12-lb block A is moving downward with a speed of 6 ft/s. Determine its speed 2 s later. Block B has a weight of 4 Ib, and the coefficient of kinetic friction between it and the horizontal plane is µg = 0.25. Neglect the mass of the cord and pulleys. B A
2. Block B has a mass m and is released from rest when it is on top of cart A, which has a mass of 3m. Determine the tension in cord CD needed to hold the cart from moving, while B is sliding down A. The coefficient of kinetic friction between A and B is µk. B D C A
29
None
The 0.7 lblb ball is shot from the spring device shown Determine the smallest stiffness k which is required to shoot the ball a maximum distance of 31 in. up the smooth plane after the spring is pushed back 3 in . and the ball is released from rest. The four cords C and plate P keep the spring compressed 2 in. when no load is on the plate.
The small collar of mass m = 0.71 kg is released from rest at A and slides down the curved rod in the vertical plane with negligible friction. Find the velocity v of the collar as it strikes the base at B. Set b = 0.59 m, h = 2.29 m.
The 7.6-kg cylinder is released from rest in the position shown and falls on the spring, which has been initially precompressed 67 mm by the light strap and restraining wires. If the stiffness of the spring is 4.5 kN/m, compute the additional deflection of the spring produced by the falling cylinder before it rebounds. 7.6 kg 200 mm ST Answer: 6 = i mm
The 0.31-kg mass slides on a frictionless wire that lies in the vertical plane. The spring attached to the mass has a free length of 80 mm and stiffness of 0.13 N/mm. Calculate the smallest value of the distance b so that the mass will reach the end of the wire at B after being released from rest at A.
When 0=60°, the boy's center of mass G has a speed of 10 ft/s as he swings to the right. Determine the rate of increase in his speed and the tension in each of the two supporting cords of the swing at that instant. The boy has a weight of 60 lb. 10 í

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