Collision Problem · PhysicsBowl 2017 #9

Physics · mechanics

Problem

A 4.00 kg object moves to the right with speed

5.00 \frac{m}{s}

. A 5.00 kg object moves to the left with speed

3.00 \frac{m}{s}

. After colliding, the 4.00 kg object moves to the left with speed

1.00 \frac{m}{s}

. What is the speed of the 5.00 kg object after the collision? (A)

1.00 \frac{m}{s}

(B)

1.80 \frac{m}{s}

(C)

3.00 \frac{m}{s}

(D)

4.11 \frac{m}{s}

(E)

7.80 \frac{m}{s}