3. Complete Activity 7.3 (Page 73).
• Take a metre scale and a long rope.
• Walk from one corner of a basket-ball court to its opposite corner along its sides.
• Measure the distance covered by you and magnitude of the displacement.
• What difference would you notice between the two in this case?
Answer:
Aim: To measure the distance and displacement while walking from one corner of the court to the opposite corner and conclude based on that.
Materials Required: Metre scale, long rope, basket-ball court.
Procedure:
(i) Obtain a metre scale and a long rope.
(ii) Starting from one corner of the basket-ball court, walk to its opposite corner along the sides.
(iii) Now measure the distance covered using the metre scale and the rope.
(iv) Calculate the magnitude of the displacement.
Observations:
We start from the origin O and reach the opposite corner B after covering the distances OA and OB.
The distance covered was found to be the sum of length and breadth = OA + OB = 30 m + 15 m = 45 m.
The displacement = √(302+ 152 ) = 33.54 m.
We notice that the magnitude of displacement is lesser than the magnitude of distance.
Conclusions: The magnitudes of distance and displacement can be different depending on the path taken. The magnitude of displacement is always equal to or less than the magnitude of distance.
“• Take a metre scale and a long rope.
• Walk from one corner of a basket-ball court to its opposite corner along its sides.
• Measure the distance covered by you and magnitude of the displacement.
• What difference would you notice between the two in this case?” – Solved.
Related Links:
Solution to Activity 7.1
Solution to Activity 7.2
Solution to Activity 7.3
Solution to Activity 7.4
Solution to Activity 7.5
Solution to Activity 7.6
Solution to Activity 7.7
Solution to Activity 7.8
Solution to Activity 7.9
Solution to Activity 7.10
Solution to Activity 7.11
Solutions to Chapter 7 Motion
