Test Preparation on Motion in Two Dimension-I- Physics Test Series For NEET 2020

Two stones of masses m and 2m are whirled in horizontal
circles the heavier one in radius
r/2
and the lighter one in
radius r. The tangential speed of lighter stone is n times that
of the value of heavier stone when they experience same
centripetal forces. The value of n is

Two racing cars of masses m₁ and  m₂ are moving in circles
of radii  r₁and  r₂ respectively. Their speeds are such that
each makes a complete circle in the same duration of time
t . The ratio of the angular speed of the first to the second
car is

A car runs at a constant speed on a circular track of radius
100 m, taking 62.8 seconds for every circular loop. The
average velocity and average speed for each circular loop
respectively is