Quantcast

A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

katykitz

  • 3 years ago

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

  • This Question is Closed
  1. arvind.satya
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    a

  2. Niyor
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 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. shine
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    a. directly proportional to sin^2θ

  4. ankurchiitd
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 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.

  5. ankitjain
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    b, becs, the vertical component of the velocity would be V cos(θ), and by applying the eq. of motion, v^2-u^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.

  6. shadowfiend
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Note that incorrect answers are not considered abuse. If you see an incorrect answer, do as you did and simply correct it.

  7. katykitz
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    umm...guys tnx 4 ur help...but could some1 pls tell me the exact answer...its so confusing !!!

  8. shadowfiend
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Several people posted the exact answer :)

  9. katykitz
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    which is it?? ....a? pls tell me!

  10. shadowfiend
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Check out the answer that has two medals... Vs the ones that have none ;)

  11. katykitz
    • 3 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    k ...got it...tnx a lot.. :)

  12. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.