A 2.50-kg block starts from rest at the top of a 30.0° incline and slides a distance of 2.30 m down the incline in 1.80 s.

(a) Find the magnitude of the acceleration of the block ______ m/s²

(b) Find the coefficient of kinetic friction between block and plane ______

(c) Find the friction force acting on the block.

magnitude ______ N

direction ______

(d) Find the speed of the block after it has slid 2.30 m ______m/s