Typical fears for children are being afraid of the dark. Oh and halloween masks.
According to the relationship between force and acceleration, described in Newton's 2nd law of motion, increasing the force of the object would also increase the objects acceleration in the same direction to which the force is applied. It essentially starts to move even faster, than it had been before. Since the object is accelerating it changing its speed at an even faster rate.
The formula is called BMI or body mass index
