Physics

Problem

2\,\text{kg}

cart is moving on a frictionless track at

3\,\text{m/s}

. From

t = 0

t = 2\,\text{s}

two horizontal forces,

5\,\text{N}

to the right and

5\,\text{N}

to the left, act on it simultaneously. Both forces are removed at

t = 2\,\text{s}

. What is the speed of the cart at

t = 4\,\text{s}

? a)

0\text{ m/s}

8\text{ m/s}

3\text{ m/s}

1.5\text{ m/s}