Question

Please answer immediately : A body sliding on a smooth inclined plane requires 4 sec to reach bottom starting from rest at top .How much time does it take to cover � th the distance starting from rest at the top

a) 1 s b) 2 s c)4s d) 16 s

Answer 1

A body start from rest so, u=0…

Let total distance covered, s…

Let a body moves with accerlation, a…

s=1/2×a×t×t…

s=1/2×a×4×4…

s=8a…

The one-fourth of total distance,s* =8a/4=2a…

s*=1/2×a×t×t…2a/a=1/2 ×t×t… 4=t×t…t=2