# Coefficient of static friction of a sliding block

1. Apr 23, 2014

### jannx3

1. The problem statement, all variables and given/known data

block is placed on a ramp at an angle of 39.4 and height of the ramp is 1.610m and the mass of the block is 8.54kg
if coefficient of kinetic friction is 0.111 and the coefficient of static friction is 0.173 what is the speed of the block at the bottom of the ramp. if it started from the rest at the top of the ramp

magnitude of the net force on the block half way down the ramp

2. Relevant equations

Dont know how to approach these questions
which equations would be most appropriate?

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Apr 23, 2014

### SammyS

Staff Emeritus
What equations do you know?

F = ma .

f = μkN

f ≤ μsN

You really need to show an attempt before we can help you. For one thing. that is a rule for these forums.

3. Apr 24, 2014

### dauto

Why don't you start by drawing a free body diagram and posting it?