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: Work and Power- homework question

  1. Feb 23, 2006 #1
    I'm doing intro-physics and i'm stuck on this Q:

    "In a human cannonball act in the circus, the barrel of a cannon is 3.05 meters long and 1070 J of work are used to accelerate the person. What is the force exerted on the person (in newtons)?"

    I know the formula for force is F=ma, but i feel like i'm missing something here.
    Can anyone help me?
     
  2. jcsd
  3. Feb 23, 2006 #2

    FredGarvin

    User Avatar
    Science Advisor

    [tex]P = \frac{w}{t} = \frac{f*d}{t}[/tex]

    Does that help?
     
  4. Feb 23, 2006 #3
    Thank you Fred.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook