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# Sir i dont understand what is displacement. I know defination but see it say the shortest distance between two points is displacement See i travel in circular road so my distance is 2pir and displacement is diameter. but that diameter givrme us wrong information. it doesnt tell exactly how much distance i walked. Why this is introduced in physics. I need detailed explaination. I am beginner of 11th standard and i try to understand these concepts.Please i have one more doubt with velocity. See every body on this earth while travelling, it tracels in any one of 8 directions. It cannot travel without direction. This universe is surrounded by 8 directions. But why speed concept is introduced How can body travel with direction. On earth anywhere a body goes, it is going in some direction. Why speed concept is introduced Iam weak in physics. I dont understand things easily. I have doubts. Please help me out

4 months ago

Saurabh Koranglekar
8407 Points
Dear student

There are two ways of measuring motion of an object

Distance and displacement

Distance is actual path traced in motion where as

Displacement is path independent it measures shortest distance from a point to another which is a vector form

While the distance is scalar

In a circular motion if an object starts from point A and reaches point A then dist is 2 *pi* r
But displacement is 0 as there is no difference in strt and stop point

Regards
4 months ago
Yashraj
277 Points

speed is just for the magnitude of the velocity as we can prefer and solve question on velocity because we trat velocity as soeed in 1 d dimension
4 months ago
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### Course Features

• 731 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions