1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Projectile motion (Basketball)

  1. Nov 25, 2016 #1
    1. The problem statement, all variables and given/known data
    A basketball player throws the ball at a 60° angle above the horizontal to a hoop which is located a horizontal distance L = 2.8 m from the point of release and at a height h = 0.4 m above it. What is the required speed if the basketball is to reach the hoop?


    2. Relevant equations
    I used V=V0+at and r(t)=r0+v0t+0.5a2
    and V0 x/y=V0sin(θ)

    3. The attempt at a solution
    My attempt: http://i.imgur.com/0vdqdvl.jpg
    Got a wrong answer. Would love some guidance. Thanks.
    Last edited by a moderator: Nov 25, 2016
  2. jcsd
  3. Nov 25, 2016 #2


    User Avatar
    Science Advisor
    Homework Helper
    2017 Award

    **Third question** You write ##0.4 = ... (5.6 V_0 )^2 ## instead of ##0.4 = ... ({5.6 \over V_0}) ^2 ##

    A quick check on the dimensions of the last term would have shown that it's not length like the other two.

    General advice is to work with symbols and only substitute values at the very last.
  4. Nov 26, 2016 #3
    Thank you so much!!! Got the right answer, and definitely will use your advice in the future.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted