displacement

IIT JEE 2015 Guidance › Mechanics questions › displacement

Two blocks mass m and 2m are kept on smooth horz surface and connected to each other using spring of "k".Initially spring is unstretched.A constant horz. force F applied to heavier block .Suppose at time t , displacement of smaller block is x, then find displacement of heavier block at this moment ?

#Physics #Mechanics

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5 Answers

24

eureka123 ·2008-12-28 10:15:18

anyone trying????

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33

Abhishek Priyam ·2008-12-29 00:50:35

Is it

(Ft²/2m)-2x

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24

eureka123 ·2008-12-29 10:15:48

nops............ans is (Ft²/4m)-x/2

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62

Lokesh Verma ·2009-01-01 00:15:31

F/3m should be acceleration of the c.m.

Displacemnt of the center of mass = 1/2 . F/3m . t²

let the disp of the larger mass be y

(2my+mx)/3m = 1/2 . F/3m . t²

(2my+mx) = 1/2 . F . t2

hence y = Ft²/4m-x/2

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62

Lokesh Verma ·2009-01-01 00:17:44

This was a very good question.. eureka :)

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