Question

A body is moving along a circular path of radius r. what is the distance and displacement of the body when it cover two and a half revolution​

Answer 1

Answer:

Explanation:

Distance covered is 5 pie r

Displacement is 2r or d

Answer 2

Distance covered = 5π r

Displacement covered = 2 r

Explanation:

• Distance is the total path covered by any body from one point to another, its unit is meter and a scalar quantity
• Displacement is the shortest path covered by a body between initial and final point, its unit is also meter and a vector quantity

given total revolutions are 2 and half

Distance covered = 2 * circumference of circle + circumference of half circle

circumference of circle = 2 π r      ( r= radius of circle)

=> Distance covered = 2 * 2π r + π r

=> Distance covered = 5 π r

Displacement covered is zero when initial and final points coincide

=> Displacement covered in first two revolution is zero and in half revolution  initial and final points lies across the diameter of circle

=> Displacement covered = 0 + π r

=> Displacement covered = π r

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