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On 2012, Jan 10, , at 08:51, John Denker wrote:I see bc was bemused too. It was helpful to notice that the optimal launch angle around 44 degrees at 1 g, varies,
Here's another end-of-chapter exercise: Quote:
If a person can jump a horizontal distance of 3.0 m
on Earth, how far could the person jump on the
moon, where the free-fall acceleration is g/6 and
g=9.81 m/s^2? How far could the person jump on
Mars, where the acceleration due to gravity is 0.38g?
When I first saw that, I thought it was nice. The physics
of jumping is something the students can relate to. This
does not even require going to the moon, because you can
simulate reduced gravity using a Peter Pan flying-wire rig.
I, w/ no additional thought, report the most recent AJP issue has an article on hoop jumping and relates to stored muscle energy, etc.
I think it "may" relate to JD's discussion.
bc thinks Atwood machine.