Define mechanical advantage, velocity ratio and efficiency of a machine.
Machines
Original Khojo Papers practice question — not from a past board paper.
2
No citable source has been recorded for this record. Treat it as practice material, not as fact.
The effort end of the string moves twice as far as the load, so the velocity ratio is 2.
From the same topic and chapter, at a similar level.
Define mechanical advantage, velocity ratio and efficiency of a machine.
Machines
State the class of lever to which a pair of scissors belongs and give one reason for your answer.
Machines
A machine has a velocity ratio of 6 and an efficiency of 80%. Calculate the mechanical advantage and the effort needed to raise a load of 480 N.
Machines
In a machine the effort moves 5 m while the load moves 1 m. Calculate the velocity ratio.
Machines
A machine raises a load of 300 N with an effort of 100 N. Calculate its mechanical advantage.
Machines
Why is the efficiency of a practical machine always less than 100%?
Machines