Question

Applying definitions Samantha ran 90 meters in 35 seconds to catch up with her dog. When she got to him, she played with him for 70 seconds before they walked back in 75 seconds. Did Saman tha travel at constant speed? What was Samantha's average speed?

Answer 1

No, Saman didn't travel at constant speed

v₁ = 90/35 = 2.57 m/s

v₂ = 0

v₃ = 90/75 = 1.2 m/s

Average speed = total distance/time

Average speed = (90+90)/(35+70+75) = 1 m/s