HELP NOW PLEASE ANSWER THE QUESTION THE PICTURE IS ATTACHED BELOW

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

Why does lightning travel from clouds to the ground?

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit