Question

Mohon bantuannya soalnya rumit menurut saya. dua nomor satu paket

Answer 1

3. a ) 3t² i + t³ j
xt₁= 3(1)² + (1)³ 
xt₁= 3 + 1 = 4 m
xt₃= 3(3)² + (3)³ 
xt₃= 27  + 27 = 54 m
v rat= Δx / Δt 
v rat= 54 - 4 / 3 -1 
v rat= 50 / 2 = 25 m/s

b) 2/t i + (4 - 1/t²) j
xt₁ = 2/(1) + (4 - 1/(1)²)
xt₁ = 2 + 3 = 5 m
xt₃ = 2/(3) + (4 - 1/(3)²)
xt₃ = 2/3 + (4 - 1/9)
xt₃ = 2/3  + 35/9 = 41/9 m
v rat= Δx / Δt
v rat= 5 - 41/9 / 3-1
v rat= 4/9 / 2 = 4/18 = 2/9 = 0,2 m/s

4) a) 3t² i + t³ j
vt₀= 3 (0)² + (0)³= 0 m/s
2/t i + (4 - 1/t²) j
vt₀ = 2/(0) + (4 - 1/(0)²) = tak terdefinisikan

b) 3t² i + t³ j
vt₁= 3 (1)² + (1)³= 4 m/s
2/t i + (4 - 1/t²) j
vt₁ = 2/(1) + (4 - 1/(1)²) = 5 m/s

c)3t² i + t³ j
vt₂= 3 (2)² + (2)³= 20 m/s
2/t i + (4 - 1/t²) j
vt₂ = 2/(2) + (4 - 1/(2)²) = 19/4= 4,75 m/s

d) 3t² i + t³ j
vt₃= 3 (3)² + (3)³= 54 m/s
2/t i + (4 - 1/t²) j
vt3 = 2/(3) + (4 - 1/(3)²) = 41/9 = 4,6 m/s