I can’t see where I am going wrong in answering this question.
The question is “ a particle with mass 9kg is sliding down a smooth inclined slope with an acceleration of 4.9ms. Find the angle of the incline”.
the smooth slope means no friction.
+x is down the slope, (which i think is all i need), so i reslove this this direction.
After resolving along F I get F = 9gsin x
Therefore I use F=ma which gives me
9gsin x = (9g)(4.9)
solving for x gives me
x = arcsin (9g X 4.9) / 9g
the 9g’s cancel giving me
x = arcsin 4.9 which can’t be solved.
Any help on where I went wrong?