15-6.A train consists of a 50-Mg engine and three cars, eachincrease its speed uniformly to 40 km/h, starting from rest,determine the force T developed at the coupling betweenthe engine E and the first car A. The wheels of the engineprovide a resultant frictional tractive force F which givesthe train forward motion, whereas the car wheels roll freely.Also, determine Facting on the engine wheeks.

Given data: Mass of engine = 50 Mg Mass of each car = 30 Mg Velocity,( vx)2 = 40 km/h Time = 80 s

Answered: 15-6. A train consists of a 50-Mg…

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 spring-held follower AB has a mass of 0.5 kg and moves back andforth as its end rolls on the contoured surface of the cam, where r = 0.15 m and z =(0.02 cos 2θ) m. If the cam is rotating at a constant rate of 30 rad/s, determine theforce component Fz at the end A of the follower when θ = 30°. The spring isuncompressed when θ = 90°. Neglect friction at the bearing C.
17-74 The two blocks A and B have a mass Ma and Mb, respectively, where Ma > Mb. If the pulley can be treated as a disk of mass M, determine the acceleration of block A. Neglect the mass of the cord and any slipping on the pulley.
5. The 25-kg block AA is released from rest.
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Determine the velocity of the cylinder A when t=4s if the system is released from rest. Cylinder A has mass of 8kg and cylinder B has a mass of 6kg. Neglect the mass of the pulleys and cords.
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The 5-kg collar slides along the curved smooth vertical rod.If the collar is released from rest at point A and the spring hasan un-stretched length of 200 mm. As the collar reach pointB determine:a) Its speed.b) The radial and transverse components of the velocity.
If the rod of negligible mass is subjected to a couple moment of M = (30t^2) N⋅⋅m, and the engine of the car supplies a traction force of F = (15t) N to the wheels, where t is in seconds, determine the speed of the car at the instant t = 12.5 s. The car starts from rest. The total weight of the car and rider is 1.5 kN. Neglect the size of the car.
The 10-lb block A travels to the right at va= 2 ft/sec at the instant shown. If the coefficient pf kinetuc friction is uk = 0.2 between the surface and A, determine the velocity of A when it has moved 4ft Block B has a weight of 20 lb. (Unit in m/sec)

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