Question

Challenge Problem: Static Friction A truck is moving at 15m/s when the brakes are applied, in order to come to a stop before hitting a pothole 20m ahead. In the back of the truck is a crate. It is not tied down, but has a coefficient of static friction Us = 0.4 with the truck bed. Will the truck be able to stop in time, without the crate sliding?

Answer 1

Answer:

A trunk is moving at 15m/s

coefficient of static friction $\mu$ s=0.4
Answeer i m/sec given vi = 15 8.- 20m -0.4 let seequired retardation to stop within limited distance is equalt tea V = v^+das No=0, U; = 15 1 s=20 0 =(15 taxax 20 0 +225 +40a --404-225 - a2225/40 - a=5.625 mlseid a=-5.625 ml seer Due to the acceleration ansendo torce acts on the curente daltly opposite te the acceleration of tracks

it fp>" fociction" then corecte slide Foama CL-5.625 Fpalm X 5.625 )N ---.(1) and ; 1 x ( ts Joncreimum (0.4x9.8) m (ts) or = (3.92m) M - ci, clearly fuciicional psendo tarce Dource so touation is unable to stop the create from st -tence Mereate Kids"