Question

Tolong ya... cara kerjanya

Answer 1

Untuk t=1 s r₁=3.1²+2.1+3 =3+2+3=8 Untuk t=5 r₂=3.5²+2.5+3 =3.25+10+3 =88 Maka Vrt= Δr/Δt=r₂-r₁/t₂-t₁ =88-8/5-1 =80/4 =20 m/s

Answer 2

Dik :
rt:3tkuadrat+2t+3
t1 : 1 s
t2: 5 s
dit : V? (tp ada garis diatasnya)
jwb :
r1 t=1 : 3×1kuadrat + 2×1+3
= 3+5 = 8
r2 t:2 = 3×5kuadrat+2×5+3
3×25+10+3 = 88
V = r2-r1/t2-t1 = 88-8/5-1 =20 m/s