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Indian Navy SSR (Sailor) Newton's Laws of Motion — practice questions

Explore 14 free Newton's Laws of Motion questions in Indian Navy SSR (Sailor) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Newton's Laws of Motion questions and exercises with answers

Showing questions 1–14 of 14.

Kinetic friction f_k is given by:Read the answer and worked solution →A 5 kg block is pushed with 30 N along a frictionless surface. Acceleration:Read the answer and worked solution →True or false: what Aristotle got wrongRead the answer and worked solution →Complete Newton's first lawRead the answer and worked solution →Which law is this?Read the answer and worked solution →MomentumRead the answer and worked solution →True or false: inertia and forceRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Tap every statement the first law licensesRead the answer and worked solution →Flip and pair: name with contributionRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Order the historical argumentRead the answer and worked solution →

Worked practice questions

Kinetic friction f_k is given by:

  1. f_k = μ_k N
  2. f_k = μ_s N
  3. f_k = μ_k m
  4. f_k = 0
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Correct answer: A. f_k = μ_k N

Kinetic friction = μ_k × N, where μ_k is coefficient of kinetic friction and N is normal reaction. Unlike static friction, this is a definite value (when surfaces slide).

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A 5 kg block is pushed with 30 N along a frictionless surface. Acceleration:

  1. 0.17 m/s²
  2. 2 m/s²
  3. 6 m/s²
  4. 150 m/s²
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Correct answer: C. 6 m/s²

We have a = F/m. That is a = 30/5. So a = 6 m/s². On frictionless surface, all applied force goes into acceleration.

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True or false: what Aristotle got wrong

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Questions
  1. Statement is true
    No
    Statement
    A force is needed to keep a body in uniform motion.
  2. Statement is true
    Yes
    Statement
    In practice a force is needed to counter friction.
  3. Statement is true
    Yes
    Statement
    Aristotle's view on this was wrong.
  4. Statement is true
    Yes
    Statement
    With no external force, a moving body keeps moving.
  5. Statement is true
    Yes
    Statement
    Galileo's work on inclined planes led to the law of inertia.
The chapter opens by correcting this directly: a force is needed in practice only to counter friction, not to keep a body moving. Source: syllabus Physics, Ch 4 Laws of Motion.

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