Question

Assertion :In a plane projectile motion, the angle between instantaneous velocity vector and acceleration vector can be anything between $0$ or $\pi$ (excluding the limiting case). Reason: In plane to plane projectile motion, acceleration vector is always pointing vertical downwards. (neglect air friction).

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

From the path equation of projectile motion, we know the range is $\theta ϵ(0,\pi )$

and during whole projectile, only one acceleration is working (g, gravity).

So both assertion and reason is correct.

But there are no relation between them.

So, option B is correct.