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Indian Navy INET Physics — practice questions

Explore 3 free Physics questions in Indian Navy INET Science. Open each question or exercise to read its content, reference answers and available explanation.

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Physics questions and exercises with answers

Showing questions 1–3 of 3.

The escape velocity of a rocket fired from the Earth is the velocity needed to overcome the:Read the answer and worked solution →Which of the following represents the equation for the position-time relation in uniformly accelerated motion?Read the answer and worked solution →How is 'power' defined in physics?Read the answer and worked solution →

Worked practice questions

The escape velocity of a rocket fired from the Earth is the velocity needed to overcome the:

  1. Moon's gravitational pull
  2. Earth's gravitational pull
  3. Centripetal force of rotation
  4. Atmospheric pressure layer
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Correct answer: B. Earth's gravitational pull

1. Escape velocity is the minimum speed needed to break free of a body's gravity. 2. For a rocket leaving Earth, the dominant force to overcome is Earth's gravity. 3. Hence it must overcome the Earth's gravitational pull. _Source: RRB Group D (RRC) PYQ, held 27-10-2013, Q.30._

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Which of the following represents the equation for the position-time relation in uniformly accelerated motion?

  1. 2as = v^2 - u^2
  2. v = u + at
  3. s = ut + (1/2)at^2
  4. a = (v - u)/t
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Correct answer: C. s = ut + (1/2)at^2

1. The position-time relation links displacement s with time t. 2. It is s = ut + (1/2)at^2. 3. v = u + at is velocity-time, and 2as = v^2 - u^2 is the velocity-position relation. _Source: RRB Group D CEN-02/2018 PYQ, Q.50._

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How is 'power' defined in physics?

  1. The work done while transferring energy from one body to another
  2. The rate of doing work or rate of energy transfer
  3. The amount of work done in exactly one minute
  4. The force that is applied to lift a heavy load
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Correct answer: B. The rate of doing work or rate of energy transfer

1. Power is defined as the rate at which work is done. 2. Equivalently, it is the rate of energy transfer per unit time. 3. Its SI unit is the watt (1 W = 1 J/s). _Source: RRB Group D CEN-02/2018 PYQ, Q.3._

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