How is science controlled by the government?

What is the most useful equation for electric power?

Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?

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)