emfarih
25. v(0) = 60, h = 45 sudut dan x h max -> v(y) = 0 i] v(y)^2 = (60 sin α)^2 - 2gh 0 = 3600 sin ^2 α - 2(10)(45) 3600 sin^2 α = 900 sin^2 α = 1/6 sin α = 1/2 α = 30 derajat ii] v(y) = v(0y) - gt 0 = 60 sin 30 - 10t 10t = 30 t = 3 s iii] x = v(0x) x t = 60 cos 30 x 3 = (30 akar 3) x 3 = x = 90 akar 3
26. v(0)=40 m/s, α=60 v(0y)= 40 sin 60 = 40 (1/2 akar 3) = 20 akar 3 t saat h max v(y) saat h max = 0 v(y) = v(0y) - gt 0 = 20 akar 3 - 10t t = 20 akar 3 / 10 t = 2 akar 3
27. v(0) = 10, α=30 v(0x) = 10 cos 30 = 5 akar 3 v(0y) = 10 sin 30 = 5
v(x) saat t=1 = v(0x) = 5 akar 3 m/s v(y) saat t=1 = v(0y) - gt = 5 - 10 = -5 m/s (arahnya kebawah) v saat t=1 = akar ((5 akar 3)^2 + (-5)^2) = akar (75+25) = akar 100 v = 10 m/s
h max -> v(y) = 0
i] v(y)^2 = (60 sin α)^2 - 2gh
0 = 3600 sin ^2 α - 2(10)(45)
3600 sin^2 α = 900
sin^2 α = 1/6
sin α = 1/2
α = 30 derajat
ii] v(y) = v(0y) - gt
0 = 60 sin 30 - 10t
10t = 30
t = 3 s
iii] x = v(0x) x t = 60 cos 30 x 3 = (30 akar 3) x 3 =
x = 90 akar 3
26. v(0)=40 m/s, α=60
v(0y)= 40 sin 60
= 40 (1/2 akar 3)
= 20 akar 3
t saat h max
v(y) saat h max = 0
v(y) = v(0y) - gt
0 = 20 akar 3 - 10t
t = 20 akar 3 / 10
t = 2 akar 3
27. v(0) = 10, α=30
v(0x) = 10 cos 30 = 5 akar 3
v(0y) = 10 sin 30 = 5
v(x) saat t=1 = v(0x) = 5 akar 3 m/s
v(y) saat t=1 = v(0y) - gt = 5 - 10 = -5 m/s (arahnya kebawah)
v saat t=1 = akar ((5 akar 3)^2 + (-5)^2) = akar (75+25) = akar 100
v = 10 m/s