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katykitz
Group Title
pls help...
for a projectile launched from ground at an angle theta with the vertical , the maximum height reached is
a. directly proportional to sin^2θ
b. directly proportional to cos^2θ
 3 years ago
 3 years ago
katykitz Group Title
pls help... for a projectile launched from ground at an angle theta with the vertical , the maximum height reached is a. directly proportional to sin^2θ b. directly proportional to cos^2θ
 3 years ago
 3 years ago

This Question is Closed

Niyor Group TitleBest ResponseYou've already chosen the best response.2
b. If the projectile is launched with an angle theta with the horizontal then only the answer is a. The formula to calculate height is: h= {(u^2)(sin^2θ)}/2g ; where u= initial velocity, g=acceleration due to gravity, θ = angle of projectile with the horizontal.
 3 years ago

shine Group TitleBest ResponseYou've already chosen the best response.0
a. directly proportional to sin^2θ
 3 years ago

ankurchiitd Group TitleBest ResponseYou've already chosen the best response.0
Lets see  if it was proportional to cos^2(theta) then a projectile launched vertically should have reached the least distance  which clearly is not true. Hence, sin^2(theta). It helps sometimes to put in 0 and 90 as the values of angles.
 3 years ago

ankitjain Group TitleBest ResponseYou've already chosen the best response.0
b, becs, the vertical component of the velocity would be V cos(θ), and by applying the eq. of motion, v^2u^2=2(a)(h) where, v=0, u= V cos(θ) &a=(g), we find that the height, h is directly proportional to cos^2(theta). @ankurchiitd: Cos(0)=1 is the max. value for the cosine function, and when the projectile would be launched vertically, i.e. with 0 degree to the vertical, it would attain the max. height.
 3 years ago

shadowfiend Group TitleBest ResponseYou've already chosen the best response.0
Note that incorrect answers are not considered abuse. If you see an incorrect answer, do as you did and simply correct it.
 3 years ago

katykitz Group TitleBest ResponseYou've already chosen the best response.0
umm...guys tnx 4 ur help...but could some1 pls tell me the exact answer...its so confusing !!!
 3 years ago

shadowfiend Group TitleBest ResponseYou've already chosen the best response.0
Several people posted the exact answer :)
 3 years ago

katykitz Group TitleBest ResponseYou've already chosen the best response.0
which is it?? ....a? pls tell me!
 3 years ago

shadowfiend Group TitleBest ResponseYou've already chosen the best response.0
Check out the answer that has two medals... Vs the ones that have none ;)
 3 years ago

katykitz Group TitleBest ResponseYou've already chosen the best response.0
k ...got it...tnx a lot.. :)
 3 years ago
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