Posted by **Elena** on Tuesday, November 23, 2010 at 10:54pm.

You're given a ramp 0.5m in height with a 3m incline. A mass of 1kg is at the top of the ramp and there is a friction of 2N.

If the ramp has a force of friction of 2N, what will the speed at the bottom of the ramp be?

- Physics-please help -
**MathMate**, Tuesday, November 23, 2010 at 11:33pm
First calculate acceleration

angle of incline, θ = arcsin(0.5/3)

mass, m = 1 kg

Component of force down the incline

=mg sin(θ)

Frictinal force = 2N

Net force down incline, F

=mg sin(θ)-2 N

Acceleration,a

=F/m

Now kinematics:

initial velocity, u = 0

2aS=v²-u²

v=speed at the bottom of the ramp.

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