In the silver sword who is jan?

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.

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)