Physics

Physics

Problem

The work done by a constant force is positive only when the angle θ\theta between the force and the displacement satisfies which of the following ranges? a) 90∘<θ<180∘90^{\circ}<\theta<180^{\circ} b) 0∘<θ<180∘0^{\circ}<\theta<180^{\circ} c) 0∘<θ<90∘0^{\circ}<\theta<90^{\circ} d) 180∘<θ<360∘180^{\circ}<\theta<360^{\circ}

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