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  1. In a rocket a seconds pendulum is mounted. Its period of oscillation decreases when the rocket
    1. comes down with uniform acceleration ​
    2. moves  round the earth  in a geostationary orbit
    3. moves up with a uniform velocity ​
    4. moves up with uniform acceleration
Correct Option: D

T = 2π √l / g .When the rocket accelerates upwards g increases to ( g + a).



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