Physics

Problem

2.0\,\text{kg}

cart initially at rest is pushed along a frictionless horizontal track by a constant horizontal force of

6.0\,\text{N}

over a distance of

4.0\,\text{m}

. What is the cart’s speed after it has moved

4.0\,\text{m}

? a)

3.5\,\text{m/s}

6.9\,\text{m/s}

4.9\,\text{m/s}

2.4\,\text{m/s}