The parachute on a race car that weighs?

Question

The parachute on a race car that weighs 7250 N opens at the end of a quarter-mile run when the car is traveling 45 m/s. What total retarding force must be supplied by the parachute to stop the car in a distance of 1100 m?
_N

Answer 1

2 a d = v^2 - vo^2

You know d = 1100 m, v = 0, and vo = 45 m/s so solve for a.

Then F = ma.