find the average speed for the given distance and time. show the unit analysis to check units,
problem:
in 5 seconds, an athlete runs 40 feet.
please and thank you....
2007-08-30 15:51:45 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
average speed = 8 ft / sec
2007-08-30 23:02:18 · answer #1 · answered by Como 7 · 1⤊ 0⤋
speed = distance / time
speed = 40 feet / 5 seconds
speed = 8 feet per second
2007-08-30 22:57:36 · answer #2 · answered by Anonymous · 0⤊ 0⤋
use the equation
d=rt
distance= rate x time
or as my math teacher says "dert"
in this example u r given the distance and the time so it looks like this
40=r5 or
40=5r
so just divide 40 by 5 and ur answer is 8
then put it back into the equation
40=8(5)
2007-08-30 22:58:17 · answer #3 · answered by Stephanie 6 · 0⤊ 0⤋
40 feet in 5 seconds OR 8 ft. a second.
OR 28,800 ft. in an hour OR About 5.5 mph
Hope this helps
2007-08-30 22:59:17 · answer #4 · answered by Kat 2 · 0⤊ 0⤋
divide 40 by 5 which comes down to 8 feet per second
2007-08-30 22:56:38 · answer #5 · answered by The Midnight Captain 4 · 0⤊ 1⤋
runs 40ft in 5 sec => runs 8ft per sec.
2007-08-30 22:59:27 · answer #6 · answered by sv 7 · 0⤊ 0⤋
8 ft / s ?
2007-08-30 22:57:17 · answer #7 · answered by Anonymous · 0⤊ 1⤋
8ft/s
ft/s=ft/s
2007-08-30 22:57:28 · answer #8 · answered by bob k 3 · 0⤊ 0⤋