Coefficient of Static Friction between truck and block

  • #1

Homework Statement


An un-tethered block sits on a flatbed truck as it accelerates up an incline that makes an angle of 15° with respect to the horizontal. If the truck speeds up at a rate less than 2.10 m/s2, the block remains on the truck. If the truck speeds up at a rate equal to or greater than this value, however, the block slides off the truck. What is the coefficient of static friction between the truck and the block?

Homework Equations


F = ma
f_s≤µ_s n


The Attempt at a Solution


((9.80 m⁄(s^2)sin(15°) -(2.20 m⁄s^2 ))/((9.80 m⁄s^2 ) cos(15°) )=0.0357

Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
PhanthomJay
Science Advisor
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You have a signage error....can you find it? What are the directions of the forces acting on the block, parallel to the incline? What is the direction of its acceleration along the incline?
 

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