WBCS.LIVE practice question

If the displacement of an object is perpendicular to the direction of the force applied, what is the work done?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Maximum
  2. Minimum but positive
  3. Negative
  4. Zero

Correct answer and explanation

Correct answer: Zero

Explanation: ✅ Correct Answer: D) Zero 📚 Explanation: In physics, work done is calculated using the formula W = F × d × cosθ, where θ is the angle between the force and displacement. When the force and displacement are perpendicular, the angle is 90°, and since the cosine of 90° is zero, no work is performed. A classic example is a person carrying a heavy load on their head and walking horizontally, as the gravity acts downwards while the motion is sideways.