Why does a class III lever always have a mechanical advantage less than one, and why is it still useful?
Machines
Original Khojo Papers practice question — not from a past board paper.
3
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Mechanical advantage = load ÷ effort = 300 ÷ 100 = 3.
From the same topic and chapter, at a similar level.
Why does a class III lever always have a mechanical advantage less than one, and why is it still useful?
Machines
Classify levers into three orders, giving one example of each.
Machines
State the velocity ratio of a single fixed pulley and of a single movable pulley, and give one use of each.
Machines
Why is the efficiency of a practical machine always less than 100%?
Machines
In a machine the effort moves 5 m while the load moves 1 m. Calculate the velocity ratio.
Machines
For an ideal machine the efficiency is 1, which means that:
Machines