Fundamental forces in nature have been classified as : Gravitational forces, weak forces, electromagnetic forces and nuclaer forces. Gravitational forces are weakest of all forces and nuclear forces are the stronges of all. Whereas gravitational forces operate over very long distance, the nuclear forces are confined only within the nucleus. Read the above passage and answer the following questions : (i) Which forces are central forces ? (ii) Which forces are non conservative forces ? (iii) What value of life do you learn from this study ?

Explanation

(i) Gravitational foces and electromagnetic forces are central forces.
(ii) Weak forces and nuclear forces are non conservative forces.
(iii) We find that gravitational forces which are weakest have the longest range, and nuclear forces, which area strongest, have the shortest range. in day to day life, it implies that when you spend energy at a slow rate `(i.e., (dU)/(dr) = F ="small")`, you last longer `(i.e., "range is longer")`. And when you spend energy at a much faster rate `(i.e., (dU)/(dt) = F = "large")`, you become extinct much sooner `("i.e., over a short distance")`. it also implies that slow and steady wins the race.