List of top Physics Questions on Motion in a plane asked in AFMC

A wheel is rotating at $900 \,rpm$ about its axis. When the power is cut off it comes to rest in $1$ min. The angular retardation in $rad/s^{-2}$ is

Generally the path of a projectile from the earth is parabolic but it is elliptical for projectile going to a very large height. Up to ordinary height the projectile moves under a uniform gravitational force, but for great heights, projectile moves under a variable force.

Minimum number of unequal vectors which can give zero resultant are:

Which one is a vector quantity?