Question

A 2.10-kg block starts from rest at the top of a 30.0° incline and slides a distance of 1.90 m down the incline in 1.40 s.
(a) Find the magnitude of the acceleration of the block.
(b) Find the coefficient of kinetic friction between block and plane
(c) Find the friction force acting on the block.



magnitude

N



direction

---Select--- up the incline down the incline normal to the incline and upward normal to the incline and downward

d) Find the speed of the block after it has slid 1.90 m.

Answer 1

do u know the formula 
s=ut+0.5at^2
s=distance travelled by the block=1.90m
u=initial velocity=0
t=time needed to travell the distance=1.40sec
a=acceleration=?
after putting all the values in the above equation 
1.90=0*1.4+0.5a*1.4^2
tell me a=?