Assertion : If in a projectile motion, we take air friction into...

Both the assertion and the reason are correct, and the reason is the correct explanation of the assertion. - Reasoning for Assertion: In projectile motion with air friction, the opposing drag force acts in the same direction as gravity during ascent, increasing the net downward acceleration ((\left.a_{\text{ascent }}=g+a_{\text{friction }}\right)). During descent, the drag force opposes gravity, reducing the net acceleration ((a_{\text{descent }}=g-a_{\text{friction }})). Because the acceleration is greater on the way up, the time to reach the peak ((t_{\text{ascent }})) is shorter than the time to fall back down ((t_{\text{descent }})). Thus, the assertion ((t_{\text{ascent }}