Final answer:
When the girl reaches point P with a slight dip, there will be a shift in potential and kinetic energy, resulting in changes in speed and potentially her motion's direction.
Step-by-step explanation:
When the girl reaches the point known as P, where a slight dip begins on the blacktop, there will be a change in her kinetic and potential energy due to the alteration of the slope. If the girl is in motion, her potential energy will decrease as she goes down the slope and her kinetic energy will likely increase, assuming there is no significant friction or other forces acting against her movement. This is due to the conservation of mechanical energy, where potential energy is converted into kinetic energy.
Moreover, if she is traveling with a constant speed and suddenly hits the dip, she might experience a brief acceleration due to the change in gradient. Additionally, depending on the depth and shape of the dip, she might temporarily lose contact with the ground if she is on a vehicle such as a bike or skateboard, or she might simply continue along the path with a slight change in speed if she is on foot. The direction of her motion might also be affected, depending on the angle of the dip in relation to her original path.