Class 9 Science — Chapter 7: Motion
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Free NCERT-aligned multiple-choice practice for Class 9 Science, Chapter 7 (Motion). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 90.
Sample questions
Which of the following is a vector quantity?
Displacement has both magnitude and direction, making it a vector quantity. Distance, speed, and time are scalar quantities.
A car starts from rest and reaches a velocity of 20 m/s in 10 s. What is its acceleration?
a = (v − u) / t = (20 − 0) / 10 = 2 m/s². Starting from rest means u = 0.
A v-t graph shows: velocity increases from 0 to 30 m/s in 10 s, stays at 30 m/s for 5 s, then decreases to 0 in 15 s. Total displacement is:
Area = triangle1 + rectangle + triangle2 = ½(10)(30) + (30)(5) + ½(15)(30) = 150 + 150 + 225 = 525 m. Wait: 150+150+225 = 525 m. Correct answer is b.
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