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ICSE Class 10 Force and Machines — practice questions — page 4

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 91–120 of 167.

How are centres combined for a complex body?Read the answer and worked solution →A wheel turns once every 2 s. What is its rotation period?Read the answer and worked solution →An object moves at constant speed around a circle. Which quantity changes?Read the answer and worked solution →In uniform circular motion, how is acceleration oriented relative to velocity?Read the answer and worked solution →Which curve needs more inward acceleration at the same speed?Read the answer and worked solution →If speed doubles, how does centripetal acceleration change?Read the answer and worked solution →How is total acceleration formed from radial and tangential components?Read the answer and worked solution →Why is tangential acceleration zero at fixed circular speed?Read the answer and worked solution →A force acts at angle θ to a lever arm r. Which expression gives torque magnitude?Read the answer and worked solution →A 6 N force acts 0.4 m from a pivot at 30° to the arm. What torque magnitude results?Read the answer and worked solution →A 20 N force acts parallel to a 0.3 m radius. What is torque about the centre?Read the answer and worked solution →A beam has 10 N downward at 2 m left and 5 N downward at 4 m right of a pivot. What is net torque?Read the answer and worked solution →A body has zero net force but nonzero net torque. Is it in static equilibrium?Read the answer and worked solution →If all moments cancel but a force remains unbalanced, which condition fails?Read the answer and worked solution →Two masses 2 kg and 6 kg are at x=0 m and x=4 m. Where is their centre of mass?Read the answer and worked solution →Why can centre of gravity shift relative to mass centre in orbit?Read the answer and worked solution →What is equilibrium called at the tipping boundary?Read the answer and worked solution →Why does a cyclist accelerate at constant speed around a circle?Read the answer and worked solution →Which acceleration components occur when circular speed changes?Read the answer and worked solution →What can a simple machine do to an applied force?Read the answer and worked solution →Which item belongs to the classical simple machines?Read the answer and worked solution →Mechanical advantage compares which two forces?Read the answer and worked solution →What is the fulcrum of a lever?Read the answer and worked solution →In a lever, what is another name for the resistance?Read the answer and worked solution →Which part lies between effort and load in a first-class lever?Read the answer and worked solution →Where is the load in a second-class lever?Read the answer and worked solution →Where is effort applied in a third-class lever?Read the answer and worked solution →Which everyday tool is a second-class lever?Read the answer and worked solution →Which tool is an example of a third-class lever?Read the answer and worked solution →A third-class lever is also known by which functional name?Read the answer and worked solution →

Worked practice questions

How are centres combined for a complex body?

  1. By averaging their colours
  2. By a mass-weighted average
  3. By adding only the areas
  4. By selecting the tallest piece
Show answer and solution

Correct answer: B. By a mass-weighted average

The whole centre of mass is calculated as a weighted average using each part’s mass.

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A wheel turns once every 2 s. What is its rotation period?

  1. 4 s
  2. 2 s
  3. 0.5 s
  4. 1 s
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Correct answer: B. 2 s

The period is the time for one rotation, so it is 2 seconds.

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An object moves at constant speed around a circle. Which quantity changes?

  1. Object's total mass
  2. Circle's outer radius
  3. Velocity's direction
  4. Path's total length
Show answer and solution

Correct answer: C. Velocity's direction

The velocity direction changes even when speed remains constant.

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