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NEETPhysicsMotion in Two Dimensions

Assertion : In case of projectile motion, the magnitude of rate of change of velocity is variable. Reason : In projectile motion, magnitude of velocity first decreases and then increases during the motion.

Options

  1. AIf both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
  2. BIf both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
  3. CIf Assertion is true but Reason is false.
  4. DIf Assertion is false but Reason is true.

Correct answer

D. If Assertion is false but Reason is true.

Step-by-step solution

(A) Assertion Analysis The assertion states that the magnitude of the rate of change of velocity in projectile motion is variable. The rate of change of velocity is acceleration. In projectile motion, acceleration is due to gravity ( (g )) and is constant. Therefore, the assertion is false. (B) Reason Analysis The reason states that the magnitude of velocity first decreases and then increases. As the projectile rises, the vertical component of velocity decreases, causing the overall speed to decrease. At the peak,

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