Question

calculate length of seconds pendulum at a place where g=9.78m/s​

Answer 1

Answer:3.96 m

Explanation:

given g=9.78 m/s

which means

t = 1s

l = ?

g = 9.78

formula to calculate

T = 2π × √l/g

1 = 2×22/7 × √l/9.78  (squaring both sides)

1² = (2×22/7 × √l/9.78)²

1 = 4×484/49× l/9.78 (leave the l in the R.H.S. and displace all the                                  

                                        values to L.H.S. with reciprocals)

1×49×9.78/484×4 = l

= 3.96 m. = l    ans.