Posted by **monic** on Tuesday, October 2, 2012 at 6:04pm.

A 3.00-kg block starts from rest at the top of a 27.5° incline and slides 2.00 m down the incline in 1.20 s.

(a) Find the acceleration of the block.

m/s2

(b) Find the coefficient of kinetic friction between the block and the incline.

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

N

(d) Find the speed of the block after it has slid 2.00 m.

m/s

- physics -
**bobpursley**, Tuesday, October 2, 2012 at 6:13pm
on the incline, the block has a normal to the incline component (mg*cosTheta), and a component of gravity force down the plane(mg*sinTheta)

a. Vf=at , but Vf^2=2ad, so

(at)^2=2ad

a=2d/t^2

b. Forcedown=mg*sinTheta-mu*mg(cosTheta)

but f=ma, so

ma= stuff to right, solve for mu.

c. Forcedown=mg*sinTheta-frictionforce

d. friction force= mu*mg(cosTheta)

- physics -
**Anonymous**, Thursday, November 15, 2012 at 3:29pm
silly

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