Question

james swims at a speed of 2 m/s when she notices a shark is behind her and accelerates so that she is skimming at 4 m/s. if her average acceleration is 1.2 m/s how long did it take for james to speed up

Answer 1

Time= t= 1.67 secs

Step-by-step explanation:

Time= t=?= 1.67 secs

Initial Velocity= Vi = 2m/s

Final Velocity= Vf = 4m/s

Average Acceleration= av= Vf-Vi/t

Putting the values : 1.2m/s²= 4-2/t

Rearranging: t= 2/1.2= 1.67 secs