Physics

Problem

A block sits on a horizontal surface and is attached to an ideal spring with spring constant

80\,\text{N}\!/\!\text{m}

. The coefficient of kinetic friction between the block and the surface is

\mu_k=0.10

. The block is pulled

0.15\,\text{m}

to the right of the spring’s equilibrium position and released. Immediately after release, the block’s acceleration to the left is measured to be

3.0\,\text{m}\!/\!\text{s}^2

. What is the mass of the block? a)

1.5\,\text{kg}

4.0\,\text{kg}

3.0\,\text{kg}

2.0\,\text{kg}