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Question

Assertion (A) : No work is done by gravitational force if a body moves along a horizontal surface.
Reason (R) : In horizontal motion, angle between gravity and displacement is $9 0^{0}$ .

A

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

B

Both (A) and (R) are true and (R) is not the correct explanation of (A)

C

(A) is true and (R) is false

D

(A) is false and (R) is true

Medium

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Solution

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Correct option is A)

$m g . d s c o s 9 0^{0} = 0$

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