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CBSE Class 11-science Answered

A stone falling from the top of a vertical tower has descended x metres when another is let fall from a point? y metres below the top. if they fall from rest and reach the ground together, show that the height of the tower is
Asked by nsoukhya | 13 May, 2020, 07:30: PM
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T o t a l space t i m e space t a k e n space b y space f i r s t space s t o n e space t o space r e a c h space t h e space g r o u n d t equals square root of fraction numerator 2 h over denominator g end fraction end root T i m e space t a k e n space b y space t h e space 1 s t space s t o n e space t o space d e s c e n d space h e i g h t space x space i s t subscript 1 equals square root of fraction numerator 2 x over denominator g end fraction end root T i m e space t a k e n space b y space 2 n d space s t o n e space t o space r e a c h space t h e space g r o u n d t subscript 2 equals square root of fraction numerator 2 open parentheses h minus y close parentheses over denominator g end fraction end root A s space p e r space t h e space q u e s t i o n t minus t subscript 1 equals t subscript 2 square root of fraction numerator 2 h over denominator g end fraction end root minus square root of fraction numerator 2 x over denominator g end fraction end root equals square root of fraction numerator 2 open parentheses h minus y close parentheses over denominator g end fraction end root O n space S i m p l i f i c a t i o n square root of 2 h end root minus square root of 2 x end root equals square root of 2 open parentheses h minus y close parentheses end root A q u a r i n g space b o t h space s i d e s 2 h plus 2 x minus 2 left parenthesis square root of 2 h end root right parenthesis left parenthesis square root of 2 x end root right parenthesis equals 2 left parenthesis h minus y right parenthesis 2 x plus 2 y equals 4 square root of h x end root x plus y equals 2 square root of h x end root O n space s q u a r i n g fraction numerator open parentheses x plus y close parentheses squared over denominator 4 x end fraction
Answered by Utkarsh Lokhande | 15 May, 2020, 12:53: AM
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CBSE 11-science - Physics
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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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