Monday, October 07, 2019

Doggies on a waxed floor



Where will you use it: inertia, friction, centripetal force? I don't think students will mind if you use it for all of those.

Can you stretch it into conservation laws? Of course you can! Low stopping force requires longer stopping time. Impulse/momentum: check. That wee force will need to act across a large distance to change the kinetic energy of those goggies! Work-energy: check.

Want to take it a step further? How did those doggos get up to speed to begin with? Hmmm...

And fear not: it all ends well.



Hat tip to Wendy A. (Rio Phyz ’88). Old physics teacher flex? Why, yes!

1 comment:

Jonathan said...

You could also discuss the dogs' attempt to slow down more quickly: by lowering the angle between their legs and the floor, they are attempting to increase the friction force (dogs do this during "tug-of-war" too)!