As to the third law every object has an equal and opposite reaction. therefore the the stone is forwarded as a result of the force applied. as to the first law, an object in motion will move at uniform velocities because of the unbalanced force. As to 2nd law, the acceleration is directly proportioal to magnitude of the net force. therefore the more force you apply from the catapault, the further it will go.'
Note that the acceleration of the car between and () is constant. Initial velocity of the car was , whereas at . Hence, at , this car would have travelled a distance of:
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At , the truck would have travelled a distance of .
In other words, at , the truck was ahead of the car. The velocity of the car is greater than that of the truck by . It would take another before the car catches up with the truck.