Physics

Problem

A trolley of mass

4\,\text{kg}

speeds up from

1\,\text{m/s}

3\,\text{m/s}

2\,\text{s}

. What is the magnitude of the net force acting on the trolley? a)

8\,\text{N}

4\,\text{N}

2\,\text{N}

6\,\text{N}