- #1
SugerQueen
- 15
- 0
In unloading a truck a man allows a 120kg crate to slide down a plank inclined at 30.0o to the horizontal. The crate accelerates at 3.90ms-2. What is the size of the frictional force?
I know I need an equation for frictional force on an incline plane to slove this but that's where my problem lies I didn't learned it in class and I can't find the equation.
my guess is: Ff= umgcosa
but if it is I'm also stuck on how to find u in this problem?
u=F/N but then how do i find N? and F? I'm really stuck and going in circles.
Hope my ramble makes sense to someone lol Thank you for any help
I know I need an equation for frictional force on an incline plane to slove this but that's where my problem lies I didn't learned it in class and I can't find the equation.
my guess is: Ff= umgcosa
but if it is I'm also stuck on how to find u in this problem?
u=F/N but then how do i find N? and F? I'm really stuck and going in circles.
Hope my ramble makes sense to someone lol Thank you for any help