1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Dartboard problem-Please help-Urgent

  1. Nov 18, 2004 #1
    Quentin claims that he can throw a dart at dartboard from distance of 2.0 m & hit 5 cm wide bullseye if he throws dart horizantally with speed of 15 m/s. He starts the throw at the same height as top of bullseye. See if Quentin is able to hit bullseye by calculating how far his shot falls from the bullseye's lower edge. THANKS IN ADVANCE!
  2. jcsd
  3. Nov 18, 2004 #2


    User Avatar
    Science Advisor
    Homework Helper

    Here's a way:
    Use [tex]d=vt[/tex] to find the amount of time the dart flies.
    Then use [tex]h=1/2gt^2[/tex] to find what distance it has fallen.
  4. Nov 18, 2004 #3
    Dart problem

    Thanks Galileo for your suggestion. I should have posted that I tried that and what I get is:

    using x=vt, 2=15t, t=7.5 secs

    y at 7.5 secs would be (using 1/2gt^2): -4.9 X 56.25 = -275.625

    275.625 m below the throwing height doesnt make sense to me or does it mean that the answer is: Quentin will not be able to hit the bullseye. Thanks
  5. Nov 18, 2004 #4
    The time of flight you calculated is wrong.
    It is actually much lower.
    If 7.5 sec was correct, Quentin could have run faster than the dart.
  6. Nov 18, 2004 #5
    Dart problem

    Thank you alalbatros! I was dividing 15 by 2 instead of the other way around. It makes sense now. Thanks again.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Dartboard problem Please Date
Electric potential problem 45 minutes ago
Finding the Mass of a Hanging Rope (Wave Problem) Yesterday at 6:38 PM
Newton's Second Law Rocket Problem Wednesday at 12:25 PM
An equilibrium problem -- Spinning a hinged rod and a ball Mar 10, 2018
Egg Drop Competition Help Please Feb 8, 2018