Solving for Acceleration and Friction on an Inclined Plane

[mickjagger]

Applying Newton's 2nd law?!

Homework Statement

A 2.91 kg block starts from rest at the top of a 32◦ incline and slides 1.98 m down the incline in 1.28 s.
The acceleration of gravity is 9.8 m/s²

What is the acceleration of the block?
Answer in units of m/s²

What is the coefficient of kinetic friction be-
tween the block and the incline?

What is the frictional force acting on the
block?
Answer in units of N.

What is the speed of the block after it slid the
1.98 m? answer in m/s

Homework Equations

Newtons 2nd's Law

ma_x=\sumf_x=mgsin\Theta

0=\sum F_y=-mgcos\Theta+n

The Attempt at a Solution

I have no idea how to approach this problem.

 

[rock.freak667]

The weight of the block can be split into two components, one parallel to the plane and one perpendicular to the plane.

What the component parallel to the plane and what is the component perpendicular to the plane?

 

[arithmetix]

The thing to realize is that acceleration is change of velocity over time, and can be related to both velocity and distance.
I would assume that the acceleration is smooth, and apply the old formula

s=ut+(1/2)at^2 [s=distance, u=initial velocity, a= acceleration]

Then I would be able to derive the acceleration that was felt by the block while it slid down the plane, which is a good start.

 

[mickjagger]

using V_x=V cos Theta and V_y=Vsin theta:
x component= 1.679?
y component= 1.0492?