A stressed out mom just purchased a cup of Starbucks coffee the bus she is riding on to work goes around a sharp curve even though she holds the cup still the coffee still squashes out which word explains this phenomenon
The word that explains this phenomenon is "splashing."
The phenomenon you are referring to is known as centrifugal force.
The word that explains this phenomenon is "inertia." Inertia is the tendency of an object to resist changes in its state of motion. When the bus goes around a sharp curve, its motion changes direction. However, the cup of coffee, due to its inertia, wants to maintain its current state of motion and continue moving straight. As a result, the coffee sloshes or squashes out of the cup, even if the mom is holding it still.
To understand this phenomenon, you can think of it in terms of Newton's first law of motion, also known as the law of inertia. According to Newton's first law, an object at rest will stay at rest, and an object in motion will stay in motion with constant velocity unless acted upon by an external force. In this case, the external force is the change in direction of the bus's motion, which the coffee resists due to its inertia.