The gravitational force between two bodies does not depend on MCQ with Answer and Explanation

Explanation:
Endoscope uses optical fibres for internal examination.

Explanation:
s_nth = u + (a/2)(2n-1) = 0 + (2/2)(20-1) = 19 m.

Explanation:
Gravitational force acts vertically downward. For horizontal displacement, the angle between force and displacement is 90°, so work W = F·d·cos90° = 0. Gravity does no work for horizontal motion; it only does work for vertical displacement components. Memory aid: 'Work = F d cosθ; θ=90° ⇒ W=0'.