Indian Navy SSR (Sailor) Physics — practice questions

Explore 2 free Physics questions in Indian Navy SSR (Sailor) Science. Open each question or exercise to read its content, reference answers and available explanation.

Practise Physics with Quill →

Physics questions and exercises with answers

Showing questions 1–2 of 2.

Friction can be reduced by changing from:Read the answer and worked solution →In case of hypermetropia (far-sightedness), where is the image of a nearby object formed?Read the answer and worked solution →

Worked practice questions

Friction can be reduced by changing from:

Sliding to rolling
Rolling to sliding
Potential to kinetic energy
Dynamic to static motion

Show answer and solution

Correct answer: A. Sliding to rolling

1. Sliding (kinetic) friction is generally larger than rolling friction. 2. Replacing a sliding contact with rolling contact (as in ball bearings) lowers friction. 3. Therefore changing from sliding to rolling reduces friction. _Source: RRB Group D (RRC) PYQ, held 27-10-2013, Q.23._

Open this question →

In case of hypermetropia (far-sightedness), where is the image of a nearby object formed?

In front of the retina
Behind the retina
On the retina
On the cornea

Show answer and solution

Correct answer: B. Behind the retina

1. In hypermetropia the eye's converging power is too weak for near objects. 2. The image of a nearby object is formed behind the retina. 3. A convex lens is used to correct it. _Source: RRB Group D CEN-02/2018 PYQ, Q.87._