A car driver is going at some speed $v$, suddenly finds a wide wall at a distance $r$. Should he apply brake or turn the car in a circle of radius $r$ to avoid hitting the wall?

A car moves at a constant speed on a road as shown in figure. What is the normal force by the road on the car $N_{\mathrm{A}}$ and $N_{\mathrm{B}}$, when it is at the points $A$ and $B$, respectively?

A particle of mass $m$ is observed from an inertial frame of reference and is found to move in a circle of radius $r$ with a uniform speed $v$. What is the centrifugal force on it?

Water in a bucket is whirled in a vertical circle with a string attached to it. The water does not fall down even when the bucket is inverted at the top of its path. We conclude that in this position