When a cup of water held upright is dropped the water spills out while it falls.?
When a cup of water is held upright and dropped, the water will spill out as the cup falls. This is due to the effects of gravity on the water and the cup. As the cup is dropped, it accelerates towards the ground, and the water inside the cup also accelerates at the same rate. However, because of the surface tension of the water, the water remains inside the cup for a brief moment. As the cup falls further and gains more momentum, the water's inertia will overcome the surface tension, and it will spill out of the cup. This phenomenon can be observed in many situations, such as when a glass of water is accidentally knocked over or when a bottle of water is dropped.