Assertion (A): Fuse wire has high resistance and low melting point. Reason (R): It must melt to break circuit on overload. MCQ with Answer and Explanation

Explanation:
36 km/h = 10 m/s. a = (0-10)/2 = -5 m/s², magnitude 5 m/s².

Explanation:
At 0°C, speed ~ 331 m/s. At room temperature (20°C) ~ 343 m/s, often taken as 340. Increases with temperature v ∝ √T. For many problems 340 is used, but at 0°C it's 331. So option A.

Explanation:
Vertical motion is independent of horizontal. t = √(2h/g). Mass doesn't affect. Horizontal velocity affects range, not time of fall. Projectile motion independence of perpendicular components.