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phetsims / forces-and-motion-basics

"Forces and Motion: Basics" is an educational simulation in HTML5, by PhET Interactive Simulations.
http://phet.colorado.edu/en/simulation/forces-and-motion-basics
GNU General Public License v3.0
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Modify teacher tips: add general statement about "magical" pusher. #209

Closed oliver-phet closed 7 years ago

oliver-phet commented 8 years ago

On 10/31 Ariel wrote:

The sim assumes the "dummy" -- what we refer to as the "pusher" -- is able to apply a force without needing friction from the ground on its feet. For instance the pusher could have something like a rocket power or such that does not require pushing against the ground. It is a bit on the "magical" side, but there are plenty of ways you could imagine having such a pusher be powered (with a rocket, a jet pack, a electromagnetic system on the road). We more wanted a clear physical object to be pushing on the masses and clearly represent the applied force.

We might consider adding something to the teacher tips (this simplification is noted in the tips for the net force screen but not for the motion screens).

just ask Amy R for a slight modification. Maybe just a more general statement, since right now in the tips the "magical" sense of the pusher/pullers is noted for the Net force screen, but it is an overall model simplification.

@arouinfar Can you add a statement to the tips to address this?

arouinfar commented 8 years ago

@oliver-phet can do, but I'm going to wait until the next version of the sim is published, since #199 also requires the Teacher Tips to be modified.

oliver-phet commented 8 years ago

Sounds great, thanks!

arouinfar commented 8 years ago

I've added this statement to the Teacher Tips, and will re-upload the tips once the sim is redeployed.

The pullers and pushers are used to embody the applied force, but are somewhat “magical” as they don’t require friction between the ground and their feet to apply a force. One could also imagine the pullers and pushers being propelled in a way does not require pushing against the ground, such as rocket power or by an electromagnetic rail in the ground (like a maglev train).

jessegreenberg commented 7 years ago

@arouinfar 2.1.0 has been deployed, removing the on-hold label.

https://phet.colorado.edu/sims/html/forces-and-motion-basics/latest/forces-and-motion-basics_en.html

arouinfar commented 7 years ago

Excellent! I'll get it uploaded this afternoon.

arouinfar commented 7 years ago

Uploaded!