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Sagot :
Explanation:
here, u = 5m/s,a = 3m/s2, v = 23m/s, t = ?, s = ?
v = u+at
23 = 5 + 3t
t = 23- 5/3 = 18/3 = 6 sec
s= ut + 1/2 at ^2
s = 5 * 6 + 1/2 * 3 * (6)^2
s = 30 + 1/2 * 3 * 36
s = 30 + 18 * 3
s= 30 + 54 = 84 m
here, u = 0, a = x, t = 5min = 300 sec, s= 5.8km = 5800m
s = ut + 1/2 at^2
5800 = 0 * 300 + 1/2 * x * (300)^2
5800 = 1/2 * x * 90000
5800= 45000 x
x = 5800/45000
x = 0.12m/sec^2
here, v = 0, t = 6sec, s = ?, a = - 9.8m/s2
s = UT + 1/2 at ^2
s = 29.4 * 3 + 1/2 * - 9.8 * (3)^2
s= 88.2 - 44.1
s= 44.1 m
s = ut + 1/2 at ^2
s = 0 * 1 + 1*2 * 9.8 * (1)^2
s = 4.9m
hope it helps you
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