Equipment Industrial Machinery

Motion and force question?

tropicalflight77 asked:


A flatbe truck is carrying a 2500kg crate of heavy machinery. The coefficient of static friction between the crate and the bed of the truck is 0.75. What is the maximum rate at which the driver can decelerate when coming to a stop and still avoid having the crate slide on the truckbed?

How would I figure this question out?

Kelly

Tags: Heavy Machinery, Maximum Rate, Truckbed

This entry was posted on Saturday, January 31st, 2009 at 12:27 pm and is filed under Physics. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

One Response to “Motion and force question?”

1. Rackbrane says:

   February 3, 2009 at 10:07 am

   Ramon

   Let:
   m be the mass of the crate,
   g be the acceleration due to gravity,
   R be the normal reaction of the truck on the crate,
   u be the coefficient of static friction.
   P be the accelerating force,
   a be the acceleration of the crate.

   For vertical equilibrium:
   mg = R

   Horizontally:
   F = ma

   If there is no slipping:
   F