Indian Navy SSR (Sailor) Mechanical Properties of Solids — practice questions

Explore 2 free Mechanical Properties of Solids 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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Mechanical Properties of Solids questions and exercises with answers

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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 →

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Kinetic friction f_k is given by:

f_k = μ_k N
f_k = μ_s N
f_k = μ_k m
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:

0.17 m/s²
2 m/s²
6 m/s²
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.