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CBSE Class 11-science Answered

<div>two tall building are 200 m apath with what must a ball will throw horizontally from window 540 m above the ground in building so as to enter a 50 m high window in the other building&nbsp;</div> <div>(hint:find speed)</div>
Asked by Manisha Marwaha | 25 Jun, 2014, 11:57: PM
Expert Answer

Given that the distance between the two buildings , x = 200 m.

Consider the motion along the vertical :

we need to find the time needed for the the ball to cover the vertical separation between the two buiding, y = 540 m - 50 m = 490 m .

Initial velocity uy=0 , y =490 m, ay = g =9.8 m/s2

Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '.

Now, the distance between the two buildings , x = 200 m.

Therefore the speed with which the ball must be thrown can be determined by :

Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '.

Therefore the speed with which the ball must be thrown horizontally from window 540 m above the ground of one building to enter a 50 m high window in the other building is 20 m/s

Answered by Jyothi Nair | 26 Jun, 2014, 09:12: AM
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