Originally Posted by

**pablohacker** Hello,

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?