Class 10 · ICSE · Physics

Machines

Levers, pulleys, mechanical advantage, velocity ratio and efficiency.

Questions: 14
PYQs: 0
Topics: 2

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Levers1 Pulley Systems1

Questions

14 questions in this chapter.

Answer available
Class 10 · Physics · Machines
A machine raises a load of 300 N with an effort of 100 N. Calculate its mechanical advantage.
3 marksMediumNumerical
Answer available
Class 10 · Physics · Machines
Why is the efficiency of a practical machine always less than 100%?
3 marksMediumShort answer
Answer available
Class 10 · Physics · Machines
The mechanical advantage of a class III lever is always:
1 markMediumMCQ
Answer available
Class 10 · Physics · Machines
For an ideal machine the efficiency is 1, which means that:
1 markMediumMCQ
Answer available
Class 10 · Physics · Machines
In a machine the effort moves 5 m while the load moves 1 m. Calculate the velocity ratio.
3 marksMediumNumerical
Answer available
Class 10 · Physics · Machines
State the velocity ratio of a single fixed pulley and of a single movable pulley, and give one use of each.
3 marksMediumShort answer
Answer available
Class 10 · Physics · 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.
4 marksHardNumerical
Answer available
Class 10 · Physics · Machines
Define mechanical advantage, velocity ratio and efficiency of a machine.
2 marksEasyShort answer
Answer available
Class 10 · Physics · Machines
Why does a class III lever always have a mechanical advantage less than one, and why is it still useful?
3 marksMediumApplication based
Answer available
Class 10 · Physics · Machines
A block and tackle system has 4 pulleys. If the efficiency is 75%, calculate the effort needed to raise a load of 900 N.
4 marksHardNumerical
Answer available
Class 10 · Physics · Machines
Classify levers into three orders, giving one example of each.
3 marksMediumShort answer
Answer available
Class 10 · Physics · Machines
The velocity ratio of a single movable pulley is:
1 markEasyMCQ

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