- #1

Mitza

- 5

- 0

## Homework Statement

A 5.21 kg block is sliding down a slope at an angle of 4.22° to the horizontal.

The block is initially moving down the slope at a speed of 1.45 m s−1 and the coefficients of friction between the block and slope are,

*μ*s = 0.500, and

*μ*k = 0.100.

Find an expression for the acceleration of the block down the slope,

*a*. (Your expression should give a positive value when the block is accelerating down the slope)

**2. The attempt at a solution**

I came up with the equation;

a=g*sin(θ)-μk*cos(θ)

However, I've been told this is incorrect so I don't really know what else to do?

Thanks in advance for any help!