Agniveer Army Workenergy: related Science practice

The practice bank below covers broader Science topics; a dedicated Workenergy lesson is not available yet.

Science questions and exercises with answers

Showing questions 1–2 of 2.

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:

500 J
0.2 J
5 J
20 J

Show answer and solution

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?

A sudden bus start jerks passengers backward
A fielder pulls his hand back catching a ball
The launching of a rocket into the sky
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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