A woman weighs 649 N. What is her mass? 

G=mg

649=10m

m=64,9kg

if we consider the gravitational acceleration 10m/s^2

because growing process had stoped after 4-5 year

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19