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t = 0 , t = 1 ; t = 2 ; t = 3
ditanya : dan
untuk : t = 0
x = 3. 0² - 4 . 0 + 36
= 0 - 0 + 36
= 36
untuk : t = 2
x = 3 .2² - 4 . 2 + 36
= 12 - 8 + 36
= 40
Δx = 40 - 36 = 4
Δt = 2 - 0 = 2
=
=
= 2 m/s
untuk : t = 1
x = 3 . 1² - 4 . 1 + 36
= 3 - 4 + 36
= 35
untuk : t = 3
x = 3 .3² - 4 . 3 + 36
= 27 - 12 + 36
= 51
Δx = 51 - 35 = 16
Δt = 3 - 1 = 2
=
=
= 8 m/s