Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

natasha.aries Group Title

A boulder is launched from the ground by a catapult with a vertical velocity of 13.0 m/s and a horizontal velocity of 15.0 m/s. It misses the enemy castle and hits the ground. How long did it take the boulder to hit enemy ground? (ignore air friction) A 0.38 s B 2.65 s C 0.75 s D 1.33 s

  • one year ago
  • one year ago

  • This Question is Closed
  1. cesckay Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    step by step.. find the initial speed of the boulder which is just the resultant component of both forces using Pythagoras theorem.

    • one year ago
  2. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    wait so how would u do that?

    • one year ago
  3. cesckay Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    X= sqrt(13^2 + 15^2)

    • one year ago
  4. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    and then?

    • one year ago
  5. cesckay Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    lol.. answer is B.. you dont have to find the resultant component since theres no angle.. sorry :( if you have the vertical component of the velocity, then just use********* time= 2v/g its kind of a long derivation though.. U r supposed to get 2.6503

    • one year ago
  6. cesckay Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    where v=13

    • one year ago
  7. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    how do u know u dont use 15?

    • one year ago
  8. cesckay Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    it is not travelling horizontally right? so the components are independent of each other.. ig you were to plug in the value for the horizontal component, then the answer would be wrong.. the resultant velocity will give you a larger answer..

    • one year ago
  9. natasha.aries Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    oh okay that makes sense! thanks!

    • one year ago
    • Attachments:

See more questions >>>

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.