Sindh Text Board Jamshoro
Class X / SSC-ΙI丨Chapter # 9丨Problems
Problem
#9.5
A
load of 21000 N Placed on the top of a screw jack of is lifted by a force of
300 N. If the length of the Tommy-bar is 35 cm and the pitch of the screw is
2.5 mm, find its mechanical advantage and efficiency.
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