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PHYSICS [3 Mark Question Answer]

Motion in One Dimension · ICSE STD 9 (ICSE - English Medium). 57 questions.

Questions · Page 2 of 2

[3 Mark Question Answer]

Question 513 Marks
A satellite makes a complete round along its circular orbit. What is its displacement?
Answer

Displacement of a satellite to make a complete round trip is= 0 as starting and ending point is coinciding.
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Question 523 Marks
Ashok starts from his house and travels 3 km to reach his school. On finding the school gates closed, he returns to his house. What is?
The displacement of Ashok
Answer

Displacement is =O as starting and ending point are coinciding.
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Question 533 Marks
Ashok starts from his house and travels 3 km to reach his school. On finding the school gates closed, he returns to his house. What is?
The distance traveled by Ashok.
Answer

Distance travelled =distance between house to school + distance between school to house=3+3 =6 km.
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Question 543 Marks
A body is moving along a circular path of radius r. What will be the distance and displacement of the body when it completes:
Two full revolutions
Answer

Distance travelled is two times the perimeter of cirle.
So distance travelled is =4π r.
Displacement =0 as starting and ending point are coinciding.
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Question 553 Marks
A body is moving along a circular path of radius r. What will be the distance and displacement of the body when it completes:
Full revolution
Answer

Distance travelled is =perimeter of circle.
So distance travelled is =2π r.
Displacement =0 as starting and ending point are coinciding.
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Question 563 Marks
A body is moving along a circular path of radius r. What will be the distance and displacement of the body when it completes:
$\left(\frac{3}{4}\right)$ th of a revolution
Answer

Distance travelled $= (3/ 4)$ of perimeter of circle.
So distance travelled is $= (3\pi r/ 2).$
Displacement can be calculated ass $= \sqrtr^2+r^2 = \sqrt2r.$
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Question 573 Marks
A body is moving along a circular path of radius r. What will be the distance and displacement of the body when it completes:
Half a revolution
Answer

In this case Distance travelled =half of the parameter of circle.
So distance travelled is =n r. Displacement= diameter of circle
So displacement is 2r.
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[3 Mark Question Answer] - Page 2 - PHYSICS STD 9 Questions - Vidyadip