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In the arrangement shown in figure if sp...

In the arrangement shown in figure if speed of point 1 and point 2 are u, then what is the velocity of block at given instant of time.

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From diagram as given problem ,

If string is tied, then `vcos theta = u `
` rArr v= u/(cos theta)`
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AAKASH INSTITUTE-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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  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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