3.)Two students are asked to find the height of a particular building using a barometer. Instead of using the barometer as an altitude-measuring device , they take it to the roof of the bulding and drop it off, timing its fall. One student reports a fall time of 2.0 sec., and the other, 2.3 sec.. How much difference does the 0.3 sec make for the estimates of the building's height.
2006-09-24 05:07:34 · 2 answers · asked by micheal j 1 in Science & Mathematics ➔ Physics
The difference is 6.321meter.
With 2 seconds timing the height of the building is 19.6 mt(S=0x2+(1/2) x9.8 x 2x2)
With 2.3 seconds timing the height of the building is 25.921 mt(S=0x2.3+(1/2) x9.8 x 2.3x2.3)
2006-09-24 05:22:28 · answer #1 · answered by indiapowdercoating 3 · 0⤊ 0⤋
The acceleration of gravity is 32 feet per second squared, so after 2 seconds the barometer is falling at 64 feet per second. Then use the formula X=VT+1/2AT^2 where V=64, T=0.3, A=32. So X=20.64 feet.
2006-09-24 12:25:52 · answer #2 · answered by campbelp2002 7 · 1⤊ 0⤋