Work done ($W$) is given by the formula $W = F \cdot d \cdot \cos(\theta)$, where $F$ is the magnitude of the force, $d$ is the magnitude of the displacement, and $\theta$ is the angle between the force and displacement vectors. When the force and displacement are perpendicular, $\theta = 90^\circ$, and $\cos(90^\circ) = 0$, so the work done is zero.
A mass of 10 kg is at a point A on a table. It is moved to a point B, 2 m apart from A. If A and B lies on some horizontal line, the work done on the object by the gravitational force will be - (1) 20 J (2) 10 J (3) 5 J (4) Zero
Asked in School Lecturer (Sanskrit Edu.) 2022 5 2022 · Topic: Mechanics (Work, Energy, and Power)
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