Question

9. Identify the object which is at rest.
(a) the tip of your pencil when you are
writing
(b) a man sitting in a car
(c) our arms when we walk
(d) a man sitting on a chair in a park​

Answer 1

Question:-

Identify the object which is at rest.

(a) the tip of your pencil when you are

writing

(b) a man sitting in a car

(c) our arms when we walk

(d) a man sitting on a chair in a park

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Option D) a man sitting on a chair in a park

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Option D) is correct because the man sitting on chair is at rest position.

While in Option A) the tip of the pencil when writing , the object is not at rest. The object (pencil) is moving.

In Option B) The car is still moving which means object is not at rest.

Also in Option C) The arms while walking are moving and also periodic motion is applied here.

Therefore, by above explanations we get that OPTION C is correct .

Answer 2

Indentifier objects which are in motion and which are at rest?