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ICSE Class 10 Force and Machines — practice questions — page 6

Explore 167 free Force and Machines questions in ICSE Class 10 Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Force and Machines questions and exercises with answers

Showing questions 151–167 of 167.

A load arm is 0.25 m and effort arm is 1 m. What load balances a 40 N effort?Read the answer and worked solution →A first-class lever has equal arm lengths. What ideal mechanical advantage follows?Read the answer and worked solution →A class I lever has a shorter effort arm than load arm. What is its ideal MA?Read the answer and worked solution →Why is a real machine's MA generally below its velocity ratio?Read the answer and worked solution →A machine takes 500 W input and loses 120 W as frictional heat. What is its output power?Read the answer and worked solution →Two simple machines in series have MAs 2 and 3. What is their combined MA?Read the answer and worked solution →A pulley tackle has six pulleys but only four rope sections support its moving block. What is ideal MA?Read the answer and worked solution →A lever balances a 180 N load 0.2 m from its fulcrum. Effort acts 0.9 m away. Find effort.Read the answer and worked solution →Why can a machine not deliver more work than it receives?Read the answer and worked solution →Match each machine parameter with its mathematical formula:Read the answer and worked solution →Match each class of levers with the position of its central component:Read the answer and worked solution →Match each pulley system with its ideal mechanical advantage (ignoring friction):Read the answer and worked solution →Match each machine design factor with its practical effect:Read the answer and worked solution →Match each rotational mechanics term with its formula and unit:Read the answer and worked solution →Match each rotational equilibrium condition with its rule:Read the answer and worked solution →Match each circular motion dynamic concept with its definition:Read the answer and worked solution →Match each common object with the position of its Center of Gravity:Read the answer and worked solution →

Worked practice questions

A load arm is 0.25 m and effort arm is 1 m. What load balances a 40 N effort?

  1. 40 N
  2. 10 N
  3. 100 N
  4. 160 N
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Correct answer: D. 160 N

Moment balance gives 40×1 = load×0.25, so the load is 160 N.

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A first-class lever has equal arm lengths. What ideal mechanical advantage follows?

  1. A value above one
  2. A zero advantage
  3. An advantage of one
  4. A value below one
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Correct answer: C. An advantage of one

Equal effort and load arms give an arm ratio of one.

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A class I lever has a shorter effort arm than load arm. What is its ideal MA?

  1. Zero mechanical advantage
  2. Below one in value
  3. Above one in value
  4. Exactly one in value
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Correct answer: B. Below one in value

The ideal lever MA is effort-arm length divided by load-arm length, so it is below one.

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