a small block b is placed on a block a of mass 5kg and lenght 20cm.initially block b is near the right end of block a.

a constant horizontal force of 10newton is applied on block a

all the surfaces are assumed frictionless

find the time elapsed before the block b seperates from block a

plz help me

Question

a small block b is placed on a block a of mass 5kg and lenght 20cm.initially block b is near the right end of block a.

a constant horizontal force of 10newton is applied on block a

all the surfaces are assumed frictionless

find the time elapsed before the block b seperates from block a

plz help me

vikas askiitian expert · Answer

let the mass of block b is m b .... force on lower block is F=10N.... accleration of system is a... (m b +5)a = 10 a= 10/(m b +5) m/s 2 now a seudo force acts on the upper block in opposite direction and its magnitude is f=(m b )a... due to this force block moves in opposite direction with accleration a 1 .... m b a 1 =m b a a 1 =a=10/(5+m b ) when the block covers a distance of 20cm then it separates out... 0.2 = a 1 t 2 /2 t 2 = (0.4/a 1 )=[0.04(5+m b )] t= 0.2(5+m b ) 1/2

Sayan · Answer

The block A will accelerate under the force 10 N applied on it. But the surfaces being frictionless, block B will remain stationary. Soblock B will separate from block A when block A has travelled a distance s equal to its length i.e. 20cm.For block A:u=0 m/s; a=Force/Mass=10/5=2NSo, v²=√(u²+2as)v=√2as=√(2*2*0.2)=0.894 m/sTherefore, v=u+at0.894=0+2t=>t=0.447 sec=0.45 sec

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a small block b is placed on a block a of mass 5kg and lenght 20cm.initially block b is near the right end of block a. a constant horizontal force of 10newton is applied on block a all the surfaces are assumed frictionless find the time elapsed before the block b seperates from block a plz help me

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a small block b is placed on a block a of mass 5kg and lenght 20cm.initially block b is near the right end of block a. a constant horizontal force of 10newton is applied on block a all the surfaces are assumed frictionless find the time elapsed before the block b seperates from block a plz help me

a small block b is placed on a block a of mass 5kg and lenght 20cm.initially block b is near the right end of block a. a constant horizontal force of 10newton is applied on block a all the surfaces are assumed frictionless find the time elapsed before the block b seperates from block a plz help me

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