Janelle S. answered 09/22/20
Penn State Grad for ME, Math & Test Prep Tutoring (10+ yrs experience)
Given: xf - x0 = 5 m
v0 = 0 m/s
vf = 20 m/s
a = constant
vf2 = v02 + 2a(xf - x0)
a = (vf2 - v02) / 2(xf - x0) = ((20 m/s)2 - (0 m/s)2) / 2(5 m) = 40 m/s2