# Conceptual Motion Problems and Solution

Question 1.
A object goes from point X to Y and then come back from Y to X. What is the displacement and average velocity?

Question 2.
Write down the difference between Scalars and Vectors?

Question 3.
Four Cyclist A,B,C ,D starts at the same point and at the same time and move in a straight line to reach destination .They all move with uniform velocities. They reach the destination in the following order
$C \to A \to B \to D$
a. If the displacement-time graph is plotted for each cyclist, which will be having highest slope
b. Arrange the cyclist in decreasing order of velocity

Question 4.
What do you infer if ?
 Distance –time graph is straight line 2 Velocity –time graph is curved 3 Displacement –time is zig zag

Question 5.
What is the difference between Uniform Accelerated and Non Uniform accelerated motion?

Question 6.
What happens to speed, velocity acceleration when an object moves in a circle with uniform speed?

Question 7.
When an object is thrown upwards, what is true of velocity and acceleration at the highest point of motion of the object?

Question 8.
True and False Statements
A. Displacement can be zero but distance never
B. Displacement magnitude can be greater than distance travelled by the object
C. Time is a vector quantity
D. If the velocity of the body decreases with time, the acceleration is negative (retardation), and the motion is called decelerated motion
E. The area of the velocity time graph gives displacement of the body
F. Acceleration is a scalar quantity
G. Motion and rest are relative terms
I. an object can be moving with Uniform speed but variable acceleration

Question 9.
Gave the formula for each
 1 Relation between Initial, final velocity ,acceleration and displacement in a uniformly accelerated straight line motion 2 Average velocity 3 Relation between Initial, final velocity ,acceleration and time in a uniformly accelerated straight line motion 4 Relation between Initial velocity ,acceleration ,displacement and time in a uniformly accelerated straight line motion 5 Average acceleration 6 Average speed

Question 10.
Difference between Speed and Velocity?

Reference Books for class 9 science

Given below are the links of some of the reference books for class 9 science.

These books by S.Chand Publications are detailed in their content and are must have books for class 9 students. Some other books that might be worth considering are
1. Oswaal CBSE Question Bank Class 9 Science Chapterwise & Topicwise We all know importance of practicing what we have studied. This book is perfect for practicing what you have learned and studied in the subject.
2. Pearson Foundation Series (IIT-JEE/NEET) Physics, Chemistry, Maths & Biology for Class 9 (Main Books) | PCMB Combo These Foundation books would be helpful for students who want to prepare for JEE/NEET exams. Only buy them if you are up for some challenge and have time to study extra topics. These might be tough for you and you might need extra help in studying these books.
3. Foundation Science Physics for Class - 9 by H.C. Verma This is one of my favorite Physics book for class 9. Most of the book is within the limits of CBSE syllabus. It might overwhelm you with its language but I feel if you can understand the content is authentic with plenty of problems to solve.

You can use above books for extra knowledge and practicing different questions.

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