3 a jet plane accelerated along a straight runway from rest to a
speed of 140m's in 50s when it took off. calculate
its change of velocity and its acceleration

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples