A valve operating in a vertical direction is opened by a cam and closed by a spring and when fully open the valve is in its lowest position. The mass of the valve is 4 kg and its travel is 12.5 mm and the constant frictional resistance to the motion of the valve is 10N. The stiffness of the spring is 9.6 N mm and the initial compression when the valve is closed is 35 mm. Determine 1. the time taken to close the valve from its fully open position, and 2. the velocity of the valve at the moment of impact. (Ans. 0.0161 s 14755 ms)

A valve operating in a vertical direction is opened by a cam and closed by a spring and when fully open the valve is in its lowest position. The mass of the valve is 4 kg and its travel is 12.5 mm and the constant frictional resistance to the motion of the valve is 10N. The stiffness of the spring is 9.6 N mm and the initial compression when the valve is closed is 35 mm. Determine 1. the time taken to close the valve from its fully open position, and 2. the velocity of the valve at the moment of impact. (Ans. 0.0161 s 14755 ms)

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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Question

5.
A valve operating in a vertical direction is opened by a cam and closed by a spring and when fully
open the valve is in its lowest position. The mass of the valve is 4 kg and its travel is 125 mm and the
constantf
t frictional resistance to the motion of the valve is 10 N. The stiffness of the spring is 9.6 N/
mm and the initial compression when the valve is closed is 35 mm. Determine 1. the time taken
to close the valve from its fully open position, and 2. the velocity of the vallve at the moment of
impact.
(Ans. 0.0161 s ; 14755 ms)

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