During a crash, the acceleration was less than 30g. calculate the force on a 70 kg person accelerating at this rate.

less than 20580 N

Explanation:

According to the newton's second law of motion

Force = mass * acceleration

(assuming gravitational acceleration =9.8 m/s2 )

acceleration = 30*9.8 = 294 m/s2

acting Force = 70 * 294

                     = 20580 N

Since the acceleration was less than 30g  , acting force should also be less than 20580 N

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement