Object slides down frictionless ramp. Find acceleration.

[fergus123]

Homework Statement

Hello, this is my first post here.
I am trying to find acceleration for an object sliding down a ramp. I have the length + height of ramp.

Height: 6.5cm
Length: 130 cm

Homework Equations

I'm at loss here. Vectors are included and this is a kinematics question.

The Attempt at a Solution

Inverse Sin of 6.5/130 give me 2.9 degrees.
Cos(2.9) x 130 is 129.8cm for the horizontal component.

 

[PhanthomJay]

You will have to apply Newton's 2nd law to find the acceleration down the plane as caused by the weight component acting parallel to the incline. See here:
http://hyperphysics.phy-astr.gsu.edu/hbase/mincl.html

 

[fergus123]

Thanks, for the answer, but my question doesn't have mass or friction involved. In elementary level physics.

 

[PhanthomJay]

No friction, fine. But all objects have mass. Make use of the link for the no friction case. Maybe you won't need to know the mass.