From a motionless helicopter a parachute jumper jumps with a motionless position (which means that the velocity is 0ms-1). He tries to open the parachute, but it does not open in the needed moment. There is a vehicle with a metros for his safety stopped 500m away from the point he is about to fall. At this particular moment the vehicle's machines show that he is falling at a velocity of 10ms-1 and is 600m up from the ground.
(Consider that the vehicle can stop immediately at any location it wishes to, the resistance of the air is zero and the gravitational acceleration is 10ms-2)
At the particular moment the vehicle starts moving. To come to the place where the parachute jumper is about to fall what has to be the minimum constant acceleration of the vehicle?
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