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May 5, 2016

# Homework Help: physics

Posted by Anonymous on Saturday, September 29, 2012 at 3:32pm.

A crate of mass 45.0 kg is being transported on the flatbed of a pickup truck. The coefficient of static friction between the crate and the truck's flatbed is 0.360, and the coefficient of kinetic friction is 0.160.
(a) The truck accelerates forward on level ground. What is the maximum acceleration the truck can have so that the crate does not slide relative to the truck's flatbed?
m/s2

(b) The truck barely exceeds this acceleration and then moves with constant acceleration, with the crate sliding along its bed. What is the acceleration of the crate relative to the ground?
m/s2
• physics - Mimi, Saturday, September 27, 2014 at 9:42pm

a) 9.8 * .36 = max a

b) 9.8 * .16 = relative a

a) Reasoning. Friction prevents sliding and the only acceleration it has thus far is gravity.

b) Reasoning. K friction is used when the vehicle is moving, which in b, it is

• physics - c, Monday, October 20, 2014 at 9:25pm

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