10 Questions
What is the distance covered by the object in its journey from O to A and back to O?
120 km
What is the difference between the distance and the displacement of an object?
The distance and displacement can be different.
What is the magnitude of the displacement of the object from O to C through A?
35 km
What is the total path length covered by the object?
95 km
What is described by specifying only its numerical value?
Distance
What is the main purpose of describing the overall motion of an object?
To locate its final position with reference to its initial position
What is the device that shows the distance travelled by a vehicle?
Odometer
What is the difference between the distance covered and the magnitude of displacement in the example given in Activity 7.3?
The distance covered is always greater than the magnitude of displacement
Can the magnitude of the displacement be equal to the distance travelled by an object?
Yes, sometimes
How can you find the magnitude of the displacement between two cities using the Road Map of India?
By finding the shortest distance between the two cities
Study Notes
Types of Motion
- Motion along a straight line is the simplest type of motion.
Distance and Displacement
- Distance is the total path length covered by an object, while displacement is the shortest distance between the initial and final positions of an object.
- Distance is a scalar quantity, and only its magnitude is specified, without direction.
- Displacement is a vector quantity, with both magnitude and direction.
- The magnitude of displacement is not always equal to the path length.
- The magnitude of displacement can be zero, even if the distance covered is not zero.
Example of Distance and Displacement
- An object moves from O to A and back to C, covering a total distance of 85 km, but the magnitude of displacement is 35 km.
- If the object returns to O, the final position coincides with the initial position, so the displacement is zero, but the distance covered is 120 km.
Odometer and Displacement
- An odometer is a device that shows the distance travelled.
- To find the magnitude of displacement between two points, such as Bhubaneshwar and New Delhi, use the difference between the final and initial readings of the odometer and a Road Map of India.
This quiz is about the simplest type of motion, where an object moves along a straight path. It covers the concept of an object's motion, its position, and its path.
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