Question

Ppz fast ......plz
Kal school Mai exam hi

Answer 1

Answer:

for a)60 .............

Answer 2

Answer : Distance travelled will be the area under the speed time curve.

(a) Distance travelled is: 2 x 1/2 (5x12) = 60m

(b) Slope of upward increasing curve: 12/5 and of decreasing curve it is: -12/5

This gives the rate of change of speed with time.

Thus equation of line, speed at 2nd second will be:12/5*2 = 4.8 m/s

Speed at 6th second: 12 - 12/5*1 = 48/5 = 9.6 m/s.... (because rate of change is negative

and from 12 to 0)

Thus total distance travelled = 1/2(12-4.8)(5-2) + 1/2(12-9.3)(6-5) = 12.15 m