A Montgolfier balloonist, moving up with a uniform speed of 10.0 m/s, drops a bag of stones at an instant when the balloon is 50.0 m above the ground. What is the speed and position of the bag at 0.50 s after its release? After the bag is dropped, it is under free fall.

• A. 2.1 m/s and 23.8 m above the ground
• B. 3.1 m/s and 33.8 m above the ground
• C. 4.1 m/s and 43.8 m above the ground
• D. 5.1 m/s and 53.8 m above the ground

Answer: (D)