4 ms·
In physics it's generally safe to assume that all the different air resistances and drags and so on cancel out. You just draw a force diagram and everything alw
by batmansbelt 12y ago
In physics it's generally safe to assume that all the different air resistances and drags and so on cancel out. You just draw a force diagram and everything always cancels, otherwise the hedgehog would have constant acceleration which we know isn't true.
- angersock 12y agoBoundary drag on the wheel as it spins causes a loss of angular momentum, and so it slows over time unless force is applied (via adorable hedgehog legs) to keep it constant. Additionally, there are likely normal frictional forces at the meeting of the wheel and the supports, as I highly doubt they gave the pet a wheel with magnetic bearings in a vacuum. And yes, the hedgehog must exert constant force in order to overcome this viscous friction. On a related note, this viscous damping term scales as velocity, so the faster the wheel turns the harder the little thing has to work to keep it at a constant velocity.
- z3phyr 12y agoIn high school homework physics, it is.