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Indian Navy AA (Artificer Apprentice) Motion in a Plane — practice questions

Explore 7 free Motion in a Plane questions in Indian Navy AA (Artificer Apprentice) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Motion in a Plane questions and exercises with answers

Showing questions 1–7 of 7.

As per your syllabus, a UNIT vector has which magnitude and which dimension?Read the answer and worked solution →As per your syllabus, the magnitude of the resultant of two vectors A and B at angle θ is given by which expression?Read the answer and worked solution →As per your syllabus, components of vector A along x and y axes are scalars whose SIGN depends on which feature?Read the answer and worked solution →As per your syllabus, eqn 3.39, the trajectory equation of a projectile y = (tan θ₀)x − [g/(2v₀²cos²θ₀)]x² describes which curve?Read the answer and worked solution →As per your syllabus, the horizontal and vertical velocities at the moment of impact depend on which factors?Read the answer and worked solution →As per your syllabus, the direction of the VELOCITY vector at any point on the circular path in UCM is which?Read the answer and worked solution →As per your syllabus, an insect on a 12 cm circular groove completes 7 revolutions in 100 s. Its angular speed is closest to which value?Read the answer and worked solution →

Worked practice questions

As per your syllabus, a UNIT vector has which magnitude and which dimension?

  1. Magnitude k and any dimension
  2. Magnitude 0 and dimensionless
  3. Magnitude 1 and dimensionless
  4. Magnitude 1 with length dimension
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Correct answer: C. Magnitude 1 and dimensionless

Your syllabus: unit vector (e.g. î, ĵ, k̂) has |x̂| = 1 and is dimensionless. It conveys direction only.

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As per your syllabus, the magnitude of the resultant of two vectors A and B at angle θ is given by which expression?

  1. √(A² + B² + 2AB cos θ)
  2. √(A + B)
  3. √(A² + B² - 2AB cos θ)
  4. √(A² + B²)
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Correct answer: A. √(A² + B² + 2AB cos θ)

syllabus eqn 3.24a (parallelogram law): R = √(A² + B² + 2AB cos θ), where θ is angle between A and B.

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As per your syllabus, components of vector A along x and y axes are scalars whose SIGN depends on which feature?

  1. The angle θ with x-axis
  2. The magnitude only
  3. No factor
  4. Only the unit chosen
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Correct answer: A. The angle θ with x-axis

syllabus last paragraph: A_x = A cos θ can be +ve, -ve or zero depending on θ. Sign carries direction info.

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