Assertion : In projectile motion if particle is projected with speed u, then speed of particle at height h would be `(sqrt (u^2 - 2gh)).` Reason : If particle is projected with vertical component of velocity `u_y` . Then vertical component at the height h would be `+- (sqrt (u_(y)^2) - 2gh).`A. (a)If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.B. (b)If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.C. (c) If Assertion is true, but the Reason is false.D. (d) If Assertion is false, but the Reason is true.

Assertion : In projectile motion if particle is projected with speed u

1.	Assertion : In projectile motion if particle is projected with speed u, then speed of particle at height h would be `(sqrt (u^2 - 2gh)).` Reason : If particle is projected with vertical component of velocity `u_y` . Then vertical component at the height h would be `+- (sqrt (u_(y)^2) - 2gh).`A. (a)If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.B. (b)If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.C. (c) If Assertion is true, but the Reason is false.D. (d) If Assertion is false, but the Reason is true.
Answer» Correct Answer - B `v_x = u_x` `v_y = +- (sqrt(u_(y)^2) -2gh)` and `v=(sqrt(v_(x)^2) +v_(y)^2)` and `u^2 = u_(x)^2 + u_(y)^2` .

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