Question

SHORT ANSWER

15) A swimmer swims 20 m in 40 s. The swimmer's average speed is m/s.


16) If someone is walking on a moving bus, name two reasonable reference points you might use to describe his or her motion.

Answer 1

Step-by-step explanation:

15)

the average speed is

20m / 40s = 20/40 m/s = 0.5 m/s

16)

the front and the back of the bus.