1.

A man thinks to remain in equilibrium by pushing in his hands and feet against two vertical parallel walls as the shown in the figure :(a) He must exert equal forces on both walls(b) The forces of friction at both walls must be equal(c ) The coefficients of friction between man and wall must be the at both ends(d) Friction must be present on both walls

Answer»

A and B are CORRECT
a and C are correct
a and d are correct
all correct

Answer :C


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