1. Not finding help here? Sign up for a free 30min 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!

Static friction

  1. Nov 15, 2006 #1
    A box full of fragile objects is on the back seat of your car. You are driving at 65 mph (29 m/s) on I-79. As you get off at exit 147A for Meadville, you must slow down to 0 mph. Estimate the minimum amount of time should you take to slow down (based on the appropriate acceleration) without the box sliding off the seat onto the floor on the car.

    any thoughts on where to start?

    we got acceleration due to gravity and velocity. We will have acceleration going in the opposite direction of motion.
  2. jcsd
  3. Nov 15, 2006 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    You are missing some data. The problem cannot be solved unless you know the coefficient of static friction between the box and the seat. Was this info given? Otherwise, the time will have to be expresed as a function of the static friction coefficient. For starters, draw a FBD of the box and apply Newton's 2nd law.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Static friction
  1. Static friction (Replies: 12)

  2. Static friction (Replies: 6)

  3. Static friction? (Replies: 8)