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Jawab
, arah -45º.
STJ (singkat, tepat, jelas) dan benar
catatan
Jika terdapat 2 vektor sama besar, misal x dan saling tegak lurus, maka resultannya
R =
Ok ?
diketahui : massa benda penyebab grafitasi = m
massa benda A = 2.m
massa benda B = 2m
massa benga C = 4 m
massa benda D = 4 m
rA = rB = rC = rD = a
ditanta R dan arah
gx.A = gA .cos
= G . . - 1
=
gx.B = gB .cos
= gB . 0
= 0
gx.C = gC .cos
= G. .1
=
gx.D = gB .cos
= gB . 0
= 0
∑gx = - + 0 + + 0
=
gy.A = gA .sin
= gA . 0
= 0
gy.B = g.B .sin
= G. . 1
=
gy.C = g.C .sin
= g.C . 0
= 0
gy.D = gD .sin
= G . . - 1
=
∑gy = 0 + + 0 -
=
Rg =
=
=
=
= 2.G m/s²
arah ...
tan α =
=
= - 1
α =