JAMB - Physics (2019 - No. 38)
The momentum of a car moving at a constant speed in a circular track
can be both positive and negative
can be zero depending on its position in the track
can be zero depending on its inertia in the track
a centrifugal
解释
Movement of an object in a circle with an acceleration towards its center is provided by change in velocity & centripetal force a α V α Fc