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Question

Block is pushed from bottom of inclined plane with speed 6 m/s as shown in figure, find time after which the block will return to the initial position?


A
t=4.2 s
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B
t=3.6s
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C
t=12.8 s
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D
Block will not return
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Solution

The correct option is D Block will not return




When block stops


mgsinθ=8×10× 35
=48

fmax=μsN=μsmgcosθ=0.8×8×10×45

=0.8×32×2

=0.8×64=51.2

block will stop & not return


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