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CBSE Class 11-science Answered

please solve the 10th question!!
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Asked by amritchirania | 10 Jul, 2019, 08:22: PM
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Let mass m1 move up with acceleration. Let masses m2 and m3 are moving down with acceleration a.
 
Figure shows the tension forces acting on each block along with own weight.
 
Let us apply Newton's law for each block
 
Block of mass m1 :    T1 - m1 g         = m1 a  .......................(1)
Block of mass m2 :    T2 + m2 g - T1 = m2 a  .......................(2)
Block of mass m3 :     m3 g - T2        = m3 a  .......................(3)
 
By adding LHS and RHS of all the above equations, we get,  (m3 + m2 - m1) g = ( m1 + m2 + m3 ) a .......................(4)
 
from eqn.(4), we get acceleration   begin mathsize 14px style a space equals open parentheses fraction numerator m subscript 2 plus m subscript 3 minus m subscript 1 over denominator m subscript 1 plus m subscript 2 plus m subscript 3 end fraction close parentheses space g end style  ........................(5)
Tension T2 is obtained from eqn.(3) and using substitutution fro acceleration using eqn.(5)
 
begin mathsize 14px style T subscript 2 space equals space m subscript 3 space g space minus space fraction numerator m subscript 3 open parentheses m subscript 2 plus m subscript 3 minus m subscript 1 close parentheses over denominator open parentheses m subscript 1 plus m subscript 2 plus m subscript 3 close parentheses end fraction g space equals space fraction numerator 2 space m subscript 1 m subscript 3 over denominator open parentheses m subscript 1 plus m subscript 2 plus m subscript 3 close parentheses end fraction space g end style
Answered by Thiyagarajan K | 11 Jul, 2019, 05:12: PM
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CBSE 11-science - Physics
answer me
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Asked by sheikhsaadat24 | 17 Apr, 2024, 09:41: PM
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CBSE 11-science - Physics
.A SHM is expressed by the equation x = A cos (ωt + φ) and the phase angle φ =0. Draw graphs to show variation of displacement, velocity and acceleration for one complete curve in SHM.
Asked by sy123946 | 07 Apr, 2024, 04:23: PM
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CBSE 11-science - Physics
the dimension of stopping potential vo in photoelectric effect in units of plank's constant 'h',speed of light 'c' and gravitational constant 'G' and ampereA
Asked by derhebha955 | 03 Apr, 2024, 09:03: AM
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CBSE 11-science - Physics
In this que while solving it we take D F of alpha =D.F of beta.Why is it so?
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Asked by sumedhasingh238 | 29 Mar, 2024, 05:15: PM
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CBSE 11-science - Physics
In physics if 2 quantities are dimensionless then their dimensional formula are equal?
Asked by sumedhasingh238 | 28 Mar, 2024, 11:10: PM
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CBSE 11-science - Physics
7. State the relation between maximum range and maximum height of the projectile if the angle of projection is 45 deg
Asked by roshnibudhrani88 | 23 Mar, 2024, 05:52: PM
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CBSE 11-science - Physics
The second overtone of a pipe closed at one end has the same frequency as the third overtone of a pipe open at both ends. Compare the length of the pipes
Asked by emad.amd | 21 Mar, 2024, 12:00: PM
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CBSE 11-science - Physics
two forces whose magnitude are in the 3:5 give a resultant f Jatio 3:5 give 20 N. If fac 20. It fue angle of thread indination of each face find Magnitude
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Asked by vinitdubey7735 | 14 Mar, 2024, 11:21: AM
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CBSE 11-science - Physics
Q17. The velocity time relation of an electron starting from rest is given by v = kt where k = 6m / (s ^ 2) Calculate the distance traversed in 2 sec. 122
Asked by om636694 | 04 Mar, 2024, 09:10: PM
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CBSE 11-science - Physics
pressure of a gas in a closed cylinder is expressed in the following manner p=pa+hpg identity the expression for absolute pressure and gauge pressure
Asked by rajuinwati12 | 04 Mar, 2024, 09:22: AM
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