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Spring has a natural length of and force constant and spring has a natural length of and a force constant . They are joined together and their free ends are stretched, so that the ends are fixed to the two wallsapart, as shown in the figure. The stretched lengths of the spring at equilibrium are respectively(springs are massless)


(a)
(b)
(c)
(d)

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Important Questions on Laws of Motion
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[Young's modulus for copper and steel are and respectively]


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(density of water is )



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A block of mass rests on another block of mass and is tied to a wall as shown in the figure. The coefficient of friction between and is and that between and ground is . The minimum force required to move the block is

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A particle moving with velocity is acted by three forces shown by the vector triangle . The velocity of the particle will

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