400 - Physics Questions Answers

Asked By: AYAN KAR
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Three identical metal spheres each of radius r are fixed at the vertices of an isosceles right angled triangle , assume r<

Asked By: AYAN KAR
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Asked By: DARIUS
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Asked By: DARIUS
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Two boys enter a running escalator at the ground floor of a shopping mall . The first boy repeatedly follows a cycle of p1=1 step up and then q1=2 steps down whereas the second boy repeatedly follows a cycle of p2=2 steps up and then q2=1 step down. Both of them move relative to escalator with a speed v=50cm/s . If the boys take t1=250s and t2=50s respectively to reach the first floor in complete number of cycles, how fast is the escalator running ? 

 

Asked By: JATIN KUMAR
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A particle projected from the ground passes two points , which are at height 12m and 18m above the ground and a distance d=10m apart . What could be the minimum speed of projection. Acceleration due to gravity is g=10m/s^2 . 

Asked By: JATIN KUMAR
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Joshi sir comment
Sir along with the written question, can you also calculate the velocity of the midpoint of CD( marked in green) under the same conditions as in question? Thank you
Asked By: DARIUS
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Joshi sir comment
Pls give Solution
Asked By: PRIYANSHU SINGH
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Joshi sir comment
SIR ANSWER IS 4 could u pls explain
Asked By: AYUSH PAINE
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Joshi sir comment

it

Asked By: FURQAAN
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Joshi sir comment

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