what object is dangerous for the target, the one that has greatest momentum or the one that has least momentum and why? what is safest?(adsbygoogle = window.adsbygoogle || []).push({});

I answeres all the parts that contain momentum and velocity and force but i stucked in this one

also

what is the value of g (acceleration due to gravity) if the radius doubled?

is the right formular for this question is Fg= G m1m2/r^2, or do i have to substitute the Fg with m*a, then do the rest

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# Momentum and acceleration due to gravity

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