A student investigates moments using a beam placed on a pivot as shown in the diagram. The student holds the beam.
What happens to the beam when the student releases it?
It rotates anti-clockwise with a net moment of 600 N cm600\text{ N cm}600 N cm.
It rotates clockwise with a net moment of 600 N cm600\text{ N cm}600 N cm.
It rotates anti-clockwise with a net moment of 900 N cm900\text{ N cm}900 N cm.
It stays in equilibrium.