A screw jack whose pitch is 5cm is used to rise aload of mass 850kg through a hight of 25.0cm the corner of the turn back of the jack 60cm if there is 70% effic
Physique/Chimie
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Question
A screw jack whose pitch is 5cm is used to rise aload of mass 850kg through a hight of 25.0cm the corner of the turn back of the jack 60cm if there is 70% efficiency calculate 1.velocity ratio 2.mechanical advantage 3.the effort required. 4.work done by the machine