Theory of Machine
The Grubler's criterion for determining the degrees of freedom (n) of a mechanism having plane motion is (where l = Number of links, and j = Number of binary joints)

n = 3(l - 1) - 2j
n = 2(l - 1) - 2j
n = (l -1) - j
n = 4(l - 1) - 3j

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Theory of Machine
Which of the following is false statement in respect of differences between machine and structure?

In machines, relative motion exists between its members, whereas same does not exist in case of structures
Machines transmit mechanical work, whereas structures transmit forces
Machines modify movement and work, whereas structures modify forces
Efficiency of machines as well as structures is below 100 %

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