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: Newtons 1st law. Simple problem.

  1. Oct 11, 2013 #1
    1. The problem statement, all variables and given/known data

    Sorry if i sound stupid, i just can't understand this problem.
    Bob wants to tow a car with his truck. He loosely attaches a rope between the vehicles. Bob accelerates rapidly with his truck, forcing the rope to snap.

    Explain the scenario using Newton's First Law.

    3. The attempt at a solution

    I want to say that the car wants to stay at rest, but shouldn't bob's truck be considered an external force acting upon it?

    Any help would be appreciated.
  2. jcsd
  3. Oct 11, 2013 #2
    Hi Ambushes,
    First law in terms of a net force: "if there is no net force acting on a body (Fnet=0), the body's velocity cannot change and the body cannot accelerate"
    The loosely tied rope probably snapped before any significant force could be exerted.
    A body at rest, stays at rest.
    Hope it helps!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted