A body falls freely from rest. The ratio of distances covered in 1st, 2nd, and 3rd seconds is MCQ with Answer and Explanation

Explanation:
Power = work/time = 500/10 = 50 W. Watt = Joule/second. This is average power. Simple division. Higher power means faster rate of doing work.

Explanation:
Electric fields deflect charged particles via Coulomb forces (F=qE), and magnetic fields deflect moving charged particles via Lorentz forces (F=qvB). Gamma rays are purely high-energy electromagnetic photons. Because they lack any electrical charge (q=0), both electric and magnetic forces on them are exactly zero. Therefore, they pass through fields completely un-deflected. R explains A perfectly.

Explanation:
a = (0-20)/4 = -5 m/s². s = 20×4 + ½(-5)×16 = 80 - 40 = 40 m. Or average velocity 10 m/s × 4 = 40 m.