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 2 years ago
Minimum velocity of a projectile is 20 m/s when a body is projected at an angle of 60 degree with the horizontal .Find the vel of projection....20 m/s,10 m/s,30 m/s or 40 m/s?
 2 years ago
Minimum velocity of a projectile is 20 m/s when a body is projected at an angle of 60 degree with the horizontal .Find the vel of projection....20 m/s,10 m/s,30 m/s or 40 m/s?

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JamesWolf
 2 years ago
Best ResponseYou've already chosen the best response.0so you want the horizontal velocity?

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0The question i have posted verbatim from my daughter's weekly test. I am not sure but there must be some conditionalities for 20 m/s to be the minimum velocity ..

JamesWolf
 2 years ago
Best ResponseYou've already chosen the best response.0and there is no diagram or anything?

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0No none. Only 4 options as I noted above.

JamesWolf
 2 years ago
Best ResponseYou've already chosen the best response.0it doesnt even have the word "the" at the start of the sentence? Perhaps she copied the question down wrong?

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0My mistake it should read "The Minimum.. I have the question paper right in front of me..

JamesWolf
 2 years ago
Best ResponseYou've already chosen the best response.0and it just gives "find the vel of projection"?

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0It reads " The Minimum.....with the horizontal. The velocity of projection is 1) 20 m/s 2) 10 m/s 3) 30 m/s 4) 40 m/s "

JamesWolf
 2 years ago
Best ResponseYou've already chosen the best response.0RIGHTTT thats much better. so the minimum velocity is 20m/s in the horizontal direction. find the absolute velocity. okay so i think it looks like this

JamesWolf
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1350148494782:dw your trying to find the hypotenuse

JamesWolf
 2 years ago
Best ResponseYou've already chosen the best response.0yes, that gives an answer which is one of your possible answers

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0Her text book says there is a minimum velocity of projection to reach a specific point .I am not very satisfied taking 20 m/s as the vel in the horizontal direction. It should have been 20 Cos 60 as the horizontal component as it remains constant..is there any other possibility?

JamesWolf
 2 years ago
Best ResponseYou've already chosen the best response.0wel in this isntance ? = 40 m/s

JamesWolf
 2 years ago
Best ResponseYou've already chosen the best response.0what is the specific point?

haridas_mandal
 2 years ago
Best ResponseYou've already chosen the best response.0How did you deduce? Pl help as I need to understand & then teach my daughter.

JamesWolf
 2 years ago
Best ResponseYou've already chosen the best response.0Well I just found the hypotenuse of that triangle \[velocity = hypotenuse = \frac{20 m /s}{\cos (60)} = 40 m/s\]
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