Question

an object moves 10m in 4 s then turns left and moves 20m in 5 s find average speed

Answer 1

speed = distance / time

S1 = 10/4 = 5/2 m/s

S2 = 20/5 = 4 m/s

S(avg) = S1 + S2 / 2

S(avg) = 2.5 + 4 / 2 = 6.5/2 = 3.25 m/s