How would i find the coefficient of sliding friction

[meredith]

the block is sliding down a wooden plane that has an incline of 22.67 degrees. the block has a mass of 31.0g.
also, the block has an acceleration of 16.94m/s^2

Homework Equations

f = ma
fnormal = (mass x acceleration due to gravity) (cos22.67) (i think?)


i tried to find the force nomral and i got 280.3 N? I am not sure if its right though or where to go from there.

THANKS EVERYONE i really appreciate it!

 

[alphysicist]

Hi meredith,

the block is sliding down a wooden plane that has an incline of 22.67 degrees. the block has a mass of 31.0g.
also, the block has an acceleration of 16.94m/s^2

Homework Equations

f = ma
fnormal = (mass x acceleration due to gravity) (cos22.67) (i think?)


i tried to find the force nomral and i got 280.3 N? I am not sure if its right though or where to go from there.

THANKS EVERYONE i really appreciate it!

Can you give the exact problem statement? If the block has an acceleration of nearly 17m/s^2, I'm thinking there are probably extra forces involved (besides gravity, normal force, and frictional force), and the normal force will depend on how those are oriented.

If the only forces with components perpendicular to the incline are the normal force and gravity then your answer would give the magnitude of the normal force.