1 / 5

Terminal Velocity

Terminal Velocity. Resultant Force. In most situations, at least two forces act on any object. The overall effect of these forces makes it act differently. For example, if a falling object had a large mass, but only a small force acting upwards on it, then it would accelerate.

celeste-aguirre
Télécharger la présentation

Terminal Velocity

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Terminal Velocity

  2. Resultant Force In most situations, at least two forces act on any object. The overall effect of these forces makes it act differently. For example, if a falling object had a large mass, but only a small force acting upwards on it, then it would accelerate. To work out the overall force, you either add or subtract the forces which act in the same direction. The overall force is also called the resultant force. If you use the formula f=ma, then f is the resultant force. For example, if an object had a mass of 10 and an acceleration of 5, you would do m x a = f ~ 5 x 10 = 15 The resultant force would be 15.

  3. What is terminal velocity? All cars and free falling objects experience terminal velocity. When they set off, their acceleration is bigger than the resistance (which slows them down). As the object gets faster the speed increases, and so does the resistance. The acceleration reduces, and eventually the acceleration and the resistance force are the same, and then the objects acceleration can’t increase anymore. The top speed is called the terminal velocity.

  4. Does terminal velocity change? If there was no air resistance, then gravity would make all objects fall at the same speed. This has been proved on the moon, where there is no air. If you dropped some rocks and some feathers together, they would both hit the ground at the same time. However, air resistance makes things fall at different speeds, so they all have a different terminal velocity. The terminal velocity depends on the drag in comparison to the weight. The drag for all objects is different, and it is determined by the objects shape and area.

  5. Skydivers A skydiver’s terminal velocity changes. When their parachute is not open, then their area is smaller, and they can reach a terminal velocity of about 120mph. When the parachute is open, there is a bigger area, so there is more air resistance. This means that the terminal velocity is lower, and the skydiver reaches a terminal velocity of around 15mph, so it is safer for them to land, The skydiver on the left has a lower terminal velocity than the one on the right.

More Related