Subject :- engineering mechanics

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# Subject :- engineering mechanics - PowerPoint PPT Presentation

Dolly vyas Branch EC 8 TH SEM Adina institute of science &technology. PRESENTED BY. Subject :- engineering mechanics.

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## Subject :- engineering mechanics

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Presentation Transcript

Dolly vyas

Branch EC 8TH SEM

PRESENTED BY

Subject :- engineering mechanics

The smooth circular cylinders of figure each of weight w = 100 N and radius r = 6 cm are connected by string AB of length l = 16cm and upon a horizontal plane, supporting a third cylinder of weight Q3= 200 N and radius r = 6cm above them. Find the tension S in the string AB and the pressure produced by the floor at points of contact D and E ?

Question

Given :-

Two smooth cylinders weight (Q1,Q2) = 100 N

Radius of the all cylinders = 6 cm

String AB length = 16 cm

upper cylinder weight (Q3) = 200 N

Tension S in the string = ?

Pressure produced by the floor at points of contact

D and E = ?

SOLUTION

In this we use lami’stherom :-

Now we find the value of Ra and Rb

For finding the value we make a free body diagram of cylinder Q3

By that we get the value of the angle between Rb and known weight

And the angle between Ra and known weight

And the angle between Ra and Rb

After that we get the value of

Ra and Rb = 1.55 N

This Ra and Rb are the tension S = 1.55 N

Since both the smooth sylinder are in the point contect of the surface so the value of the pressure at the point contect will be

Ra + Rb = weights of all cylinder

Since Ra and Rb are equal so

2 Ra = 400 n