Students can explore how animals generate electric fields, how information is stored on magnetic media, and how leather is made. How is information stored on credit cards? (You can get a neat science gizmo that indicates magnetic fields…).The properties of leather made from the skin of electric eels and the durability of magnetized credit card information strips are the main ideas here. I’m not going to get into the anatomy of men urinating… The chemistry of urine is another option. Students can explore the behavior of electricity in different fluids, and the behavior of fluids as they flow or are poured from different heights. How does electricity travel in solutions?.The ability of electricity to travel through fluids is the main idea here. Students can explore using pulleys to lift different objects. The story of a man being hit multiple times by the same barrel of bricks.Ĭan a person be electrocuted by urinating on the third rail?Ĭan an eel skin wallet erase a credit card ? It is ALSO the fourth episode of Season 2. An object moving downward with greater than terminal velocity (for example because it was affected by a downward force or it fell from a thinner part of the atmosphere or it changed shape) will slow until it reaches terminal velocity. More drag means a lower terminal velocity, while increased weight means a higher terminal velocity. Terminal velocity varies directly with the ratio of weight to drag. At this point the object ceases to accelerate altogether and continues falling at a constant speed called terminal velocity (also called settling velocity). At a particular speed, the drag force produced will equal the object's weight ( m g). It's still falling, it's just falling at a constant speed.Īs the object accelerates (usually downwards due to gravity), the drag force acting on the object increases, causing the acceleration to decrease. It falls faster and faster UNTIL it stops increasing the speed of its fall. The object doesn't fall faster and faster infinitely.
This doesn't mean it stops falling this means the speed of its fall doesn't continue to increase over the length of the fall. This causes the net force on the object to be zero, resulting in an acceleration of zero. A free-falling object achieves its terminal velocity when the downward force of gravity ( F g) equals the upward force of drag ( F d).
0 kommentar(er)
