Physics

Problem

2.0\,\text{kg}

cart initially at rest experiences a net horizontal force that is

+4\,\text{N}

for the first

1.0\,\text{s}

, then

+2\,\text{N}

for the next

2.0\,\text{s}

, and finally

-6\,\text{N}

for the last

1.0\,\text{s}

of a

4.0\,\text{s}

interval. What is the magnitude and direction of the cart’s net impulse during the

4.0\,\text{s}

interval? a)

+8\,\text{N}\!\cdot\!\text{s}

toward the right b)

+2\,\text{N}\!\cdot\!\text{s}

toward the right c)

-2\,\text{N}\!\cdot\!\text{s}

toward the left d)

0\,\text{N}\!\cdot\!\text{s}

(no net direction)