The second's pendulum is taken from earth to moon, to keep time period constant
(a) the length of the second's pendulum should be decreased
(b) the length of the second's pendulum should be increased
( c) the amplitude should increase
(d) the amplitude should decrease.

Answer

A

Explanation

`g_(mo on)=g_(earth)/6=g/6 rArr` T=constant
`:. l` should be made `(l)/(6)` at moon
`("because" T = 2pi sqrt(l/g)=2pi sqrt(1//6)/(g//6))`.