A truck with a mass of 9000 kg is moving at a constant velocity of 20 m/s. A sandbag weighing 1000 kg initially stationary falls vertically and lands in the back of the truck. What is the new velocity of the truck after catching the sandbag?

• A. 18 m/s
• B. 20 m/s
• C. 22 m/s
• D. 24 m/s

Answer: (A)