Question

two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these question from the codes (a), (b), (c), and (d) as given below:

Assertion (A) : A ball thrown vertically upward always returns back to the earth.

Reason (R): The ball falls back due to the gravitational force of the earth

(a) Both (A) and (R) are true and (R) is correct explanation of the assertion.
(b) Both (A) and (R) are true but (R) is not the correct explanation of the assertion.
(c) (A) is true but (R) is false.
(d) (A) is false but (R) is true.

Answer 1

(a) Both (A) and (R) are true and (R) is the correct explanation of the assertion.

• Every object on earth feels the gravitational force and same is with the ball being thrown upwards with a particular velocity.

• The value of the gravitational acceleration is = 9.8 m/s², which is also rounded off as 10 m/s².