What is the mass of a man who has a weight of 588 n on earth?
a. 55 kg
b. 60 kg
c. 65 kg
d. 70 kg

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)