Atrain of mass 320000 kg accelerate uniformly from rest. it takes 57 s to travel a distance of 810 m in a straight line. find the average net force acting on the train.

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