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Diket :Pers. Posisi
X = 10t² + 8t + 6
Tanya ;
Kondisi awal untuk t = 0
A. Posisi, Xo = __?
B. Kecepatan, Vo = __?
C. Percepatan, ao = __?
Jawab :
A.
Posisi awal itu saat t = 0, sehingga :
X(t) = 10t² + 8t + 6
X(0) = 10(0)² + 8.(0) + 6
X(0) = 6 m
B.
Kecepatan sesaat,
V(t) = dx/dt
V(t) = d(10t² + 8t + 6)/dt
V(t) = 20.t + 8
Saat awal, t = 0
V(0) = 20•0 + 8
V(0) = 8 m/s
C.
Percepatan sesaat,
a(t) = dv/dt
a(t) = d(20.t + 8)/dt
a(t) = 20
Maka percepatan awal, saat t = 0 adalah
a(0) = 20 m/s²
Jawaban : ----
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