The linear motion of an object is when it:

Class 6 Science Chapter 5 Quiz on Length and Motion
Prepare for your exams with a well-structured quiz on measurement of length and motion for Class 6 Science. These MCQs test your knowledge of measuring instruments, different types of movement and real-life applications. Answers are provided to help students clarify doubts and strengthen their grasp of key concepts.

Answer: (A)
The linear motion of an object is when it moves in a straight line.