Answers

2014-05-03T23:16:24+05:30
A = v-u/t
a = 72000 - 0 / 5X60
a = 72000 / 300
a = 240 m per second square
By II equation of  motion -
s = ut + 1/2 a t x t
s = 1/2 x 240 x 300 x 300
s = 120 x 90000 = 10800000 m = 10800 km
0
2014-05-10T11:57:07+05:30
(a)
a = change in velocity/time
we mulipy it by 60 to make it in seconds-5*60
final velocity-72
a = 72000 - 0 / 5X60
a = 240 m/second square
(b)
s = ut + 1/2 a t * t
s = 120 * 90000 = 10800000 m
 = 10800000/10000
=1080km
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