Equations of MotionPractice Questions & MCQs
Practice Equations of Motion questions from Describing Motion Around Us (Class 9 Science) - important MCQs with answers and step-by-step solutions. Solve the sample questions below, then practice the full set free on the RankByte app.
Equations of MotionQuiz - Solve & Score
Q1. Which equation does NOT contain time t?
- A.v^2 = u^2 + 2as
- B.v = u + at
- C.s = ut + (1/2)at^2
- D.s = (u+v)t/2
Answer: A. v^2 = u^2 + 2as
Asked for the unknown; data is laid out in the stem. By v^2 = u^2 + 2as relates v, u, a and s only. v^2 = u^2 + 2as relates v, u, a and s only. So option A) v^2 = u^2 + 2as. Others fail: option B) 'v = u + at' misses the point - Contains t; option C) 's = ut + (1/2)at^2' doesn't hold - Contains t.
Q2. Which of the following is a scalar quantity?
- A.Speed
- B.Velocity
- C.Displacement
- D.Acceleration
Answer: A. Speed
The core fact here is - Speed has only magnitude -> scalar. That fits the listed correct option directly - Correct. Looking at the others: option B) 'Velocity' fails since A vector; option C) 'Displacement' fails since A vector. Hence the answer is A) Speed.
Q3. A body starts with velocity 5 m/s and moves with uniform acceleration 2 m/s^2. Its velocity after 4 s and the distance covered in this time are:
- A.13 m/s and 36 m
- B.13 m/s and 52 m
- C.8 m/s and 36 m
- D.7 m/s and 36 m
Answer: A. 13 m/s and 36 m
Diagnose the question type - a typical physics numerical. The data on the table: 5 m, 2 m, 4 s. We are after the quantity the stem asks for. Tool of choice - v = u+at = 5+2x4 = 13 m/s. Rearrange it for the unknown before substituting. Numbers in: v = u+at = 5+2x4 = 13 m/s → s = ut+0.5at^2 = 5x4+0.5x2x4^2 = 36 m. Lock in option A) 13 m/s and 36 m. Trap-watch: option B) '13 m/s and 52 m' is wrong because Distance = ut + (1/2)at^2; do not omit the factor 1/2; option C) '8 m/s and 36 m' fails since Velocity = u + at; do not omit u.
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Where can I practise Equations of Motion questions for Class 9 Science?
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Are these Equations of Motion questions important for the exam?
Yes. These Equations of Motion important questions follow the Science exam pattern (CBSE Boards, plus JEE and NEET foundation), so they help with both school and competitive prep.
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