t (s): 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
x (s): 0, 5, 20, 45, 80, 90, 100, 100, 100, 100, 80, 60
1. find the greatest speed. I don't know which one it is since there are 4 points of "100"
2. least speed? Do I count "0" or"1"?
3. the speed is constant? would I choose 6, 7, 8,9?
4. average speed of particles for the first 7 s?
5. find the instantaneous speed of the particles at 3s.
Could someone explain all of this to me?
2006-10-17 23:35:13 · 2 answers · asked by sleepy 1 in Science & Mathematics ➔ Physics
The actual meaning of speed is dx/dt,
Try using the formula v = (x2-x1)/(t2-t1)
1) max average 6th sec 16.667
max instantaneous speed is in 4th second 35m/s
2)least speed is zero (when x is constant)
3)7 8 9
4) 100/7 = 14.28 m/s
2006-10-18 01:35:56 · answer #1 · answered by The Potter Boy 3 · 0⤊ 0⤋
in first question they are secretly asking for instantaneous speed means from any pt in the graph say between 6 to 7sec
greatest speed is when time is 4 to 5sec here speed is 35m/s
least one is between 6s to 9sec here oject is stationary means 0m/s
yes 6,7,8,9
(0+5+20+45+80+90+100+100) / 7 = 440/7=62.8 m/s
instantaneous speed at 3 sec= 45-20/1= 25 metres/sec
2006-10-18 13:00:12 · answer #2 · answered by Anonymous · 0⤊ 0⤋