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B.Tech Automobile Physics — practice by topic

Browse 30 questions across 3 Physics topics. Choose what you want to revise, then open a question to check its answer and worked solution.

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Physics topics

Mechanical Engineering (30)Physics (30)Rotation and Torque (30)

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An engineer marks how far a point has swung round a shaft. That angle is measured in:Read the answer and worked solution →A radian compares an arc length with a radius. The quantity is therefore:Read the answer and worked solution →A flywheel's angle changes steadily with time. That rate of change is the angular:Read the answer and worked solution →A shaft spec sheet lists angular velocity. The units used are radians per:Read the answer and worked solution →

Worked practice questions

An engineer marks how far a point has swung round a shaft. That angle is measured in:

  1. Radians
  2. Rations
  3. Rattles
  4. Raffles
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Correct answer: A. Radians

1. Rotation is measured as an angle. 2. The natural unit compares arc to radius. 3. That unit is the radian. _Source: OpenStax University Physics Volume 1, Chapter 10, Fixed-Axis Rotation._

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A radian compares an arc length with a radius. The quantity is therefore:

  1. Defenceless
  2. Dimensionless
  3. Directionless
  4. Doubtless
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Correct answer: B. Dimensionless

1. Both arc and radius are lengths. 2. Dividing one by the other cancels units. 3. So a radian is dimensionless. _Source: OpenStax University Physics Volume 1, Chapter 10, Fixed-Axis Rotation._

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A flywheel's angle changes steadily with time. That rate of change is the angular:

  1. Velocity
  2. Vibration
  3. Vignette
  4. Viscosity
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Correct answer: A. Velocity

1. The angle is moving as time passes. 2. How fast it moves has its own name. 3. That is angular velocity. _Source: OpenStax University Physics Volume 1, Chapter 10, Fixed-Axis Rotation._

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