You go out for a run after dinner; suppose that during 115m of your run you steadily increase your speed from 4.20m/s to 5.00m/s. How long does this increase in speed take? a 30 s b 25.0 s c 0.0300 s d 30.0 s

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.