Physics

Problem

1.5\,\text{kg}

block slides along a roughless horizontal surface while a horizontal force acts parallel to its motion as follows: •

+4\,\text{N}

from

x=0

x=1\,\text{m}

•

-2\,\text{N}

from

x=1

x=3\,\text{m}

•

+3\,\text{N}

from

x=3

x=5\,\text{m}

If the block’s speed at

x=0

2.0\,\text{m/s}

, what is its speed when it reaches

x=5\,\text{m}

? a)

4.0\,\text{m/s}

6.1\,\text{m/s}

3.5\,\text{m/s}

2.0\,\text{m/s}