2006-12-18 11:37:04 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics
I think it's more meaningful to compare energy involved. Energy is what does the damage. Convert 20 mph to feet/second
20 mph * (88 ft/sec)/(60 mph) = 29 ft/sec.
KE = (1/2)*m*(29 ft/sec)^2 = 430*m (ft/sec)^2
Potential energy = U = m*g*h
So the h that makes KE = U:
430*m (ft/sec)^2 = m*32*h ft/sec^2
h = 430/32 = 13 ft That's maybe 1 1/2 stories.
2006-12-18 12:30:11 · answer #1 · answered by sojsail 7 · 1⤊ 0⤋
4 or 5
2006-12-18 11:39:39 · answer #2 · answered by Anonymous · 0⤊ 0⤋
i'd say that that is possibly authentic, considering a 4story progression would furnish you with sufficient time to develop p.c. and boost up to 30 mph. basically imagine once you dive off a diving board, how straight away you boost up as you bypass down. This of course relies upon on the right of hte 4 tale progression although...
2016-11-30 22:42:31 · answer #3 · answered by ? 4 · 0⤊ 0⤋
Forget about energy.
20 mph = 29.333 ft/sec → y = V²/(2g) = 13.36 ft
2006-12-18 15:10:12 · answer #4 · answered by Steve 7 · 0⤊ 0⤋