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ICSE Class 10 Force and Machines — practice questions — page 3

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 61–90 of 167.

How many scalar equilibrium equations apply to a particle in 3D?Read the answer and worked solution →Where is the centre of mass of a mass distribution defined?Read the answer and worked solution →In a uniform gravitational field, how do centre of mass and gravity centre compare?Read the answer and worked solution →What can the centre of gravity represent for a body at rest?Read the answer and worked solution →A body tips when the vertical line through its centre of gravity falls outside what?Read the answer and worked solution →What tends to happen when the centre of gravity lies outside the base?Read the answer and worked solution →How can a complex shape’s centre of mass be estimated from parts?Read the answer and worked solution →What path does circular motion follow?Read the answer and worked solution →For a rotation with period T, what is its angular velocity?Read the answer and worked solution →Why does velocity change in uniform circular motion?Read the answer and worked solution →At a point on a circle, which way does the velocity point?Read the answer and worked solution →Which force is required to produce centripetal acceleration?Read the answer and worked solution →Without centripetal acceleration, how would an object move?Read the answer and worked solution →Which object is an example of circular motion?Read the answer and worked solution →What is the path speed called when an object circles once?Read the answer and worked solution →A body completes one orbit in 2π seconds. What is its frequency?Read the answer and worked solution →What is the direction of velocity in circular motion?Read the answer and worked solution →In rotation about a fixed axis, where does each particle move?Read the answer and worked solution →A 10 N push acts 0.5 m from a wrench pivot at right angles. What torque results?Read the answer and worked solution →If a fixed force acts perpendicularly to a lever, what happens to its torque when the lever arm is made longer?Read the answer and worked solution →A force acts directly toward a pivot along the radius. What is its torque?Read the answer and worked solution →Two torques about one point are 8 N m clockwise and 3 N m anticlockwise. What is the resultant?Read the answer and worked solution →A perpendicular force doubles while its lever arm stays fixed. What happens to torque?Read the answer and worked solution →A 12 N force acts perpendicularly 2 m from a pivot. Find its torque.Read the answer and worked solution →Why does a longer wrench usually turn a tight nut more easily?Read the answer and worked solution →Which three totals vanish in planar balance?Read the answer and worked solution →Two equal masses sit at opposite ends of a light rod. Where is their centre of mass?Read the answer and worked solution →A body is split into two parts of masses 1 kg and 3 kg. Which part weighs more in the centre-of-mass average?Read the answer and worked solution →In aircraft dynamics, relative to which point are forces and moments resolved?Read the answer and worked solution →A support is shifted so the centre of gravity leaves the base. What changes?Read the answer and worked solution →

Worked practice questions

How many scalar equilibrium equations apply to a particle in 3D?

  1. One
  2. Six
  3. Two
  4. Three
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Correct answer: D. Three

In rectangular coordinates, the three directional force sums each vanish.

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Where is the centre of mass of a mass distribution defined?

  1. Its heaviest particle
  2. Its mean mass location
  3. Its outer boundary
  4. Its highest point
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Correct answer: B. Its mean mass location

The centre of mass is the mean location of a mass distribution.

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In a uniform gravitational field, how do centre of mass and gravity centre compare?

  1. The centres coincide
  2. Their positions differ
  3. One lies outside body
  4. They are unrelated points
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Correct answer: C. One lies outside body

They occupy the same position when the gravitational field is uniform.

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