Just as friction opposes the motion of solid surfaces that are in contact, a force also opposes motion when a solid object moves through a gas or a liquid. This force, called drag force, occurs when solid objects come into contact with the molecules in the liquid or gas. Drag that occurs when an object … Read more

https://ngscience.com/wp-content/uploads/4-NGScience-Waves-and-Information-07.mp3 [my_audio_player] When waves hit an object, they can also be taken in, or absorbed, by the object. Look at the size and placement of the rocks along the sea wall. They have been designed so that the waves from the ocean can’t pass through, but also don’t get reflected directly back to the boats. … Read more