A cyclist starts from rest and accelerates for 5 seconds at 3/m^2. After the first 5 seconds, the cyclist continues at a constant speed for 5 more seconds. Explain during which interval the cyclist’s average acceleration is greater, 4.0-5.0 s or 5.06.0s

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.