A 30.0-kg child sits on one end of a long uniform beam with a mass 20.0 kg and a 40.0-kg child sits on the other end. The beam balances when a fulcrum is placed below the beam a distance 1.10 m from the 30.0-kg child. How long is the beam?
A)2.12 m
B)1.98 m
C)1.93 m
D)2.07 m
E)2.20 m

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The Answer of A 30.0-kg child sits on one end of a long uniform beam with a mass 20.0 kg and a 40.0-kg child sits on the other end. The beam balances when a fulcrum is placed below the beam a distance 1.10 m from the 30.0-kg child. How long is the beam?
A)2.12 m
B)1.98 m
C)1.93 m
D)2.07 m
E)2.20 m

A 300-Kg Child Sits on One End of a Long Uniform