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Find the tension in the horizontal strin...

Find the tension in the horizontal string PQ and the string QR in the given figure [ Take g =` 10 m//s^(2)`]

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We may take the components and redraw it as
` (##AAK_T1_PHY_C03_SLV_014_S01.png" width="80%">
From figure, we get
` T_(1) sin 30^(@) = 70 N`
and ` T_(2) = T_(1) cos 30^(@)`
` :. T_(1) = 140 N`
and ` T_(2) = 140 xx sqrt(3)/2 = 70 sqrt(3) N`
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AAKASH INSTITUTE ENGLISH-LAWS OF MOTION-Assignment (SECTION-D) (Assertion-Reason Type Questions)
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  3. A : Acceleration of an object in uniform motion is zero. R : No forc...

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  4. A : Newton's second law of motion gives the measurement of force. R ...

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  5. A : According to Newton's third law of motion for every action, there ...

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  6. A : Inertia depends on the mass of an object. R : Greater the mass, ...

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  7. Assertion : In the case of free fall of the lift, the man will feel ...

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  8. A : Static friction force is a self adjusting force. R : The interat...

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  9. Assertion : The value of dynamic friction is less than the limiting fr...

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  10. A : During horizontal circular turn of a car, the centripetal force re...

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  11. A : A person on a frictionless surface can get away from it by blowing...

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  12. A : It is difficult to move a cycle along a road with its brakes on. ...

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  13. A : It makes easier to walk on slippery muddy road if we throw some sa...

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  14. A : Banking of roads reduces the wear and tear of the tyres of automob...

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  15. A : The centripetal and centrifugal forces never cancel each other. ...

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  16. A : Work done by friction can increase the kinetic energy of the body...

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