A lizard walks at a velocity of 10 m/s and then slows down to 5 m/s in 4 seconds. What is the lizard’s acceleration?

Answer 1

assuming the acceleration is constant, the acceleration (if negative it is decceleration), is the change in velocity divided by the time

(5-10)/4 --> -5m/s / 4 s --> -1.25 m/s^2