a. A boy moving on a bicycle with a speed of 18 km/h. b. A fast runner running with a speed of 10 m/s. c. A scooter moving with a speed of 800 m/min.
a. A boy moving on a bicycle with a speed of 18 km/h. b. A fast runner running with a speed of 10 m/s. c. A scooter moving with a speed of 800 m/min.










