Question

A box weighs 196 N on a spring balance at the north pole. Its weight recorded on the same balance if it is shifted to the equator is close to (Take g = 10 ms^–2 at the north pole and the radius of the earth = 6400 km):

(1) 195.66 N

(2) 194.66 N

(3) 194.32 N

(4) 195.32 N

Answer 1

Answer is (4) 195.32 N

at pole, weight = mg = 196

m = 19.6 kg

at equator, weight = mg – mω²R

= 195.33 N

Answer 2

Answer is (4) 195.32 N

W = 196 – mω²R