Batman and Joker do math

Unhappy Camper

Hells yeah
Founder
Mar 10, 2008
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Fayettenam Area, NC



Batman (mass 80.0 kg) stands on a window ledge 5.0 m above the floor (Fig. 8-40). Grabbing a rope attached to a chandelier, he swings down to grapple with the Joker (mass 70.0 kg), who is standing directly under the chandelier.

(Assume that Batmam's center of mass moves down 5.0 m. He releases the rope just as he reaches the joker.)



a) With what speed do the entwined foes start to slide across the floor?

b) If the coefficient of kinetic friction of their bodies with the floor is μ = 0.250, how far do they slide?








Doeeeeeeeeeeeet ~~~ !! ( no cheating you dumb bastards... <label for="rb_iconid_28">
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Mamba

Uranium
Founder
May 22, 2008
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I really really hate maths. Perhaps more than washing up.

Anyway, what good does it do, unless you're a physicist or nuclear fissionist?

That's why we have calculators.
 

Mamba

Uranium
Founder
May 22, 2008
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Eh? What.... like.... showering?
Uh..... no. I veryyyyyy enjoy showering. Especially when the jet ...

I mean washing dishes. Washing up = washing dishes. (British speak)

Or in Spanish it's "fregar los platos"

Comprende? :)
 

KommieKat

Mao's Pet Cat
Founder
Mar 2, 2008
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Hong Kong, hiding from the Kommies!
^^^

That's a good questions actually.
Let's pretend he's in Sheng Hai with the mass of pollution they have.

So, I'd say there are some golf ball sized air particles floating around to impend Batman's trajectory.
 

Mamba

Uranium
Founder
May 22, 2008
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CLASSROOM question
What's the circumference of the Physics teacher's tits?

And at what speed and how high do they bounce if the coefficient of kinetic friction of her boobs with her bra is μ = 0.250?