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Kriti
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Asked: 2026-08-20T04:31:51+00:00 In:

Rohan studies science from 6 PM to 7:30 PM at home. Consider the tip of the minute’s hand of the wall clock. During the given time interval, what is its: (i) distance travelled, (ii) displacement, (iii) speed and (iv) velocity. The length of the minute’s hand is 7 cm (Fig. 4.32).

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The minute hand completes 1.5 revolutions in 90 minutes. Distance = 1.5 × 2π × 7 = 21π cm. Displacement = 14 cm. Average speed = 21π/5400 cm s⁻¹ and average velocity = 14/5400 cm s⁻¹ downward.

class 9 science exploration chapter 4 question answerclass 9 science exploration chapter 4 solutionsconsider the tip of the minute’s hand of the wall clockncert solutions – describing motion around usscience from 6 pm to 7:30 pm at homethe length of the minute’s hand is 7 cm (fig. 4.32).
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