Q:- Why is it easier to roll a barrel than to pull it?
Ans:- This is due to the concept of friction. As the rolling force of friction is less than the dynamic force of sliding friction therefore it is easier to roll a barrel than to pull it.
Q:- If a feather, a wooden ball and a steel ball fall simultaneously in a vacuum, which one of these would fall faster?
Ans:- All will fall at the same speed in vacuum because there will be no air resistance and the earth’s gravity (acceleration due to gravity = 9.8 m/s2) will exert a similar gravitational pull on all.
Q :- Which is more elastic, steel or rubber? Continue reading “Common daily life science queries – 5”