546 - Physics Questions Answers

Asked By: RISHI
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Joshi sir comment
Sir tell how to write time period eq for this question
Asked By: ANVESH
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In a gravity free space a small ball is placed at the centre of a box of the same mass. The ball and the box both are moving with velocity u towards a fixed wall. Assume all collisions are perfectly elastic. 

A) How many collisions are possible?

B) find velocities of the box and the ball and the position of the ball relative to the box after all possible collisions. 

Asked By: DIPYAMAN
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pls solve question 8

Asked By: DSW
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Asked By: AMARNENI SIVA TEJA
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sir pls upload a video with detailed explanation as soon as possible
Asked By: HARDIK
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. Dear Sir kindly help solve this question

1
Asked By: RK GUPTA
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A point source of light is placed at the centre of curvature  

of a hemispherical surface. The radius of curvature is r  

and the inner surface is completely reflecting. Find the  

force on the hemisphere due to the light falling on it if  

the source emits a power W.

Asked By: ANKIT SHARMA
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Sir this is figure given in question. Question: Electric field lines of portion of an electric field that is symmetrical with respect to rotation about y-axis are show in the figure. A charge particle stays in equilibrium at point (0,10). If modulus of charge of the particle is changed gradually till it shifts to another equilibrium position (0,0),estimate fractional change in the charge modulus.                                                      Options : A) 1/3 B)2/3 C)1/9 D)8/9
Asked By: MUDIT
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Dear Sir kindly help provide the correct approach and solution to solve this 2016 iit jee advanced rotational question. 

Two approaches

For angular velocity about z axis there are two approaches in solutions available in books , internet , first one considering spin angular velocity and revolution angular velocity about z axis itself ; second one considering spin angular velocity and revolution angular velocity perpendicular to rod through O and then calculating angular velocity about z axis  taking cosine component of revolution angular velocity. 

May refer 2nd picture attached. 

Question 
Asked By: RK GUPTA
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