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RRB Paramedical Workenergy — practice questions

Explore 2 free Workenergy questions in RRB Paramedical Science. Open each question or exercise to read its content, reference answers and available explanation.

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Workenergy questions and exercises with answers

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If a person moves a trolley a distance of 10 m by applying a force of 50 N, the work done is:Read the answer and worked solution →Which of the following examples illustrates Newton's third law of motion?Read the answer and worked solution →

Worked practice questions

If a person moves a trolley a distance of 10 m by applying a force of 50 N, the work done is:

  1. 500 J
  2. 0.2 J
  3. 5 J
  4. 20 J
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Correct answer: A. 500 J

1. Work = Force × distance (in the direction of force). 2. = 50 N × 10 m. 3. = 500 J. _Source: RRB Group D CEN-02/2018 PYQ, Q.43._

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Which of the following examples illustrates Newton's third law of motion?

  1. A sudden bus start jerks passengers backward
  2. A fielder pulls his hand back catching a ball
  3. The launching of a rocket into the sky
  4. A bicycle slows when we stop pedalling
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Correct answer: C. The launching of a rocket into the sky

1. Newton's third law: every action has an equal and opposite reaction. 2. A rocket pushes gases downward (action) and is pushed upward (reaction). 3. The other options illustrate inertia or friction, not the third law. _Source: RRB Group D CEN-02/2018 PYQ, Q.35._

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