Saturn has a radius of 60,330,000 meters and a mass of 5.7 × 10^26 kilograms. calculate the strength of its
gravitational field.

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)