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CBSE Class 11-science Answered

explain me question number 29 of page 88
Asked by anjummulla1861 | 07 Oct, 2015, 12:11: PM
answered-by-expert Expert Answer
begin mathsize 14px style Given colon Range comma space straight R equals 3 space km Angle space of space projection comma space straight theta equals 30 degree Acceleration space due space to space gravity comma space straight g equals 9.8 space straight m divided by straight s squared Horizontal space range space for space the space projection space velocity space straight u subscript 0 comma space is space given space by space the space relation colon straight R equals fraction numerator straight u subscript 0 superscript 2 sin 2 straight theta over denominator straight g end fraction 3 equals fraction numerator straight u subscript 0 superscript 2 over denominator straight g end fraction sin 60 degree square root of 3 cross times square root of 3 equals fraction numerator straight u subscript 0 superscript 2 over denominator straight g end fraction cross times fraction numerator square root of 3 over denominator 2 end fraction space space space space left square bracket because 3 equals square root of 3 cross times square root of 3 right square bracket fraction numerator straight u subscript 0 superscript 2 over denominator straight g end fraction equals 2 square root of 3 space space space space space space... space left parenthesis 1 right parenthesis The space maximum space range space left parenthesis straight R subscript max right parenthesis space is space achieved space by space bullet space when space it space is space fired space at space an space angle space of space 45 degree space with space the space horizontal comma space that space is comma straight R subscript max equals fraction numerator straight u subscript 0 superscript 2 over denominator straight g end fraction space space space space space space space... space left parenthesis 2 right parenthesis On space comparing space equations space left parenthesis 1 right parenthesis space and space left parenthesis 2 right parenthesis comma space we space get comma straight R subscript max equals 2 square root of 3 equals 2 cross times 1.732 equals 3.46 space km Hence comma space there space is space no space way space one space can space hope space to space hit space the space target space 5 space km space away. end style
Answered by Faiza Lambe | 07 Oct, 2015, 02:38: 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
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CBSE 11-science - Physics
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CBSE 11-science - Physics
A particle is projected from a point P with a velocity v at an angle θ with horizontal. At a certain point Q it moves at right angles to its initial direction. Then (a) velocity of particle at Q is vsintheta (b) velocity of particle at Q is Vtantheta (c) time taken from P and Q is v/g sin theta (d) time taken from P and Q is v/gsectheta
Asked by hy9022075 | 11 Jan, 2023, 05:06: PM
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CBSE 11-science - Physics
A baseball is hit by a bat and given a velocity of 40.0m/s at an angle of 30 degree above the horizontal. The height of the ball above the ground upon impact with the bat is 1.0 m  a) what maximum height above the ground does the wall reached b) a feilder is 110.0 m from home plate with the ball is hit and the balls trajectory is directly at home if he begins running at the moment the ball is hit and catches the ball. when it is still 3.0 m above the ground. How long does he run before catching the ball. C) how fast does he have to run in order to catch the ball
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CBSE 11-science - Physics
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CBSE 11-science - Physics
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CBSE 11-science - Physics
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Asked by riyag9034 | 26 Jul, 2020, 07:06: PM
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CBSE 11-science - Physics
If a ball launched with initial velocity of 25 m/s at 45 degree. Find the maximum range covered by the ball? 
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CBSE 11-science - Physics
Pls solve
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Asked by suchananag2002 | 27 Feb, 2020, 09:48: AM
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CBSE 11-science - Physics
what is lowest speed of an object in the projectile motion fired with an angle 30º and speed is 5m/s?
Asked by nirvardhansinghranawat7773 | 11 Oct, 2019, 01:27: PM
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