A mobile is shown in the figure. The horizontal supports have negligible mass. Assume that all the numbers given in the figure are accurate to two significant figures. What mass M is required to balance the mobile? 
Definitions:
Theory
A systematic set of ideas and principles designed to explain certain phenomena or patterns, often forming the basis for further exploration and testing.
Prosumer Capitalism
An economic system where consumers are also involved in the production process, often enabled by digital technology and altering traditional consumer-producer roles.
George Ritzer
An American sociologist recognized for his work on consumerism, globalization, and the theory of McDonaldization of society.
Double Exploitative
A term describing situations or systems where individuals or groups are subjected to two overlapping forms of exploitation, often related to labor and resources.
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