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m=50 gr=5x10-²kg
g=9,8 m/s²
Rab=3cm=3x10-²
qa=0.2x10^-6 c
qb=0,5x10^-6
maka : T ????
F=k.qa.qb/Rab²
=[(9x10^9)(0,2x10^-6)(0,5x10^-6)]/ (3x10-²)² N.
=1N
W=m.g
=[5x10-²)(9,8)]
=0,49 N
terus gunakan rumus:
T=R
≈√f²+w²
≈√1²+(0,49)²
≈√1²+(49/100)²N
≈√1+(2.401/10.000)N
≈√10.000/10.000 +2.401/10.000 N
≈√12.401/10.000 N
≈111,36/100 N
≈1,11 N .
Tegangan tali ≈1,11 N.
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