A cart moves to the right on a frictionless track

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Linear Momentum · Linear Momentum

Problem

2.0\,\text{kg}

cart moves

3.0\,\text{m/s}

to the right on a frictionless track. It then enters a region where a horizontal force acts as follows: •

+6\,\text N

(to the right) for

1.0\,\text s

•

-4\,\text N

(to the left) for

3.0\,\text s

What is the cart’s velocity when it leaves the region

4.0\,\text s

after entering? (a)

3.0\,\text{m/s}

to the right (b)

7.0\,\text{m/s}

to the right (c)

0.0\,\text{m/s}

(d)

3.0\,\text{m/s}

to the left