Free Work MCQs with Answers
169 Work MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Work is done when a force produces displacement, with its value determined by the component of force along the displacement. The topic covers positive, negative and zero work, work by variable forces from force-displacement graphs, and the connection between net work and change in kinetic energy.
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169 questions · page 9 of 9
- A. Force into small intervals
- B. The displacement into small intervals
- C. Both force and displacement into small intervals
- D. By taking displacements at different angles
Explanation: The work done by a variable force is calculated by integrating the force over the displacement.
Correct answer: The displacement into small intervals- A. Frictional force
- B. Effort + distance
- C. Effort-distance
- D. Effort +distance
Explanation: Frictional force is a non-conservative force.due to its energy-dissipating nature and the path-dependent work it entails.
Correct answer: Frictional force- A. 1J
- B. 10J
- C. 0J
- D. 100J
Explanation: The formula for work done (W) is:W=F×d×cosθW = F \times d \times \cos\thetaW=F×d×cosθWhere:W = Work done (in Joules)F = Force (in…
Correct answer: 1J- A. 10 J
- B. 1 J
- C. 0 J
- D. 5 J
Explanation: To calculate work done, the formula is Work = Force × Displacement × cos(θ), where θ is the angle between the force and displacement…
Correct answer: 0 J- A. Negative
- B. Positive
- C. Zero
- D. Maximum and positive
Explanation: When the body moves against the force of friction on a horizontal plane, the work done by the body is negative.
Correct answer: Negative- A. Nonconservative
- B. Conservative
- C. Both conservative and nonconservative
- D. None of the above
Explanation: Non-conservative forces are those that do work on an object, resulting in dissipation or loss of energy.
Correct answer: Nonconservative- A. Negative
- B. Positive
- C. Zero
- D. All of the above
Explanation: When a person pulls their friend in the opposite direction of the bicycle's motion, the work done by them is negative.
Correct answer: Negative- A. Each point on the curve
- B. Slope of the curve
- C. Area under the curve
- D. None is true
Explanation: This is the correct option. The work done is equal to the area under the curve on a force-displacement graph.
Correct answer: Area under the curve- A. 120 J
- B. 100 J
- C. 1000 J
- D. 1200 J
Explanation: The work done on an object when it is lifted can be calculated using the formula: Work = Weight x Height.
Correct answer: 1200 J