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lalu,
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untuk t = 4s, cari kecepatan pada t = 2s
karena garisnya sama, gunakan persamaan a yang awal
karena sumbu y = 5, maka a = 5
(0,8) dan (2,5)
m = 5-8 / 2-0
= - 3/2
y - 8 = -3/2 (x-0)
y = -3/2 x + 8
a = -3/2 t + 8
a) t = 1
a = -3/2.1 +8
= - 3/2 + 16/2
= 13/2 ---> a₂
L = 1/2 (a₁+a₂). t₁
= 1/2 (8+13/2). 1
= 8/2 + 13/4
= 16/4 + 13/4
= 29/4 ----> V₁
Sehingga : Vt = Vo + V₁
= 5 + 29/4
= 20/4 + 29/4
= 49/4 m/s
= 12,25 m/s
b) t = 4
V₂ = 1/2 (a₁+a₅). t₂
= 1/2 (8+5). 2
= 13 m/s
V₄ = a₅.t₄-₂
= 5. (4-2)
= 10 m/s
Vt = Vo + V₂+V₄
= 5 + 13 + 10
= 28 m/s