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Principle of Moments

m1gd1=m2gd2⇒7.85=3.92m_1 g d_1 = m_2 g d_2 \Rightarrow 7.85 = 3.92
Anticlockwise moment7.85 N·m
Clockwise moment3.92 N·m
Net moment-3.92 N·m
  • Make the beam tip clockwise
  • Balance the beam
  • Hold up a 2 kg mass at 40 cm using a 4 kg mass — where must it hang?
  • Produce a clockwise moment of about 12 N·m