Physics problem with drag racer?
A drag racer, starting from rest, speeds up for 393 m with an acceleration of +16.3 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.51 m/s2. How fast is the racer moving 3.31E+2 m after the parachute opens?
Comments
Velocity = sqrt.(2ad), = 113.189m/sec.
Vi^2 = Vf^2 + 2ad.
Vf = sqrt.(Vi^2 - 2ad) = sqrt.113.189^2 - (2(5.51 x 331)), = 95.73m/sec.