A bird is traveling 40.5 meters per second the wind speed is 10.5 meters per second

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

If a balloon is taken outside on a very cold day, what will occur?

Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)