Question 7 - Data for an object covering distances - Questions at the end of the chapter - Chapter 8 Class 7 - Measurement of Time and Motion (Curiosity)

Last updated at August 10, 2026 by

Q 7
Question
Data for an object covering distances in different intervals of time are given in the following table. If the object is in uniform motion, fill in the gaps in the table.
Time (s) 0 10 20 30 40 50 60 70
Distance (m) 0 8 16 24 32 40 48 56

🔗 Concept: 8.4 Uniform and Non-uniform Linear Motion

Fill the gaps — use uniform motion rule (equal distance in equal time). Question 7 - Data for an object - Measurement of Time an - Class 7 (Cu - Questions at the end of the chapter
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Speed = 0.8 m/s — gaps filled: d(20s)=16 m, t(32m)=40 s, d(50s)=40 m, t(48m)=60 s

Explanation

  • Find speed: 8 m in 10 s → Speed = 0.8 m/s
  • Uniform motion: distance = 0.8 × time
$$d = 0.8 \times t$$ $$t = 20\text{ s} \Rightarrow d = 16\text{ m} \quad;\quad d = 32\text{ m} \Rightarrow t = 40\text{ s}$$ $$t = 50\text{ s} \Rightarrow d = 40\text{ m} \quad;\quad d = 48\text{ m} \Rightarrow t = 60\text{ s}$$
Speed = 0.8 m/s — use d = 0.8 × t to fill all gaps.
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