You may have seen in a circus a motorcyclist driving in a vertical loop inside a 'death well' chamber with holes, so the spectators can watch from outside. Explain clearly why the motorcyclist does not drop down when he is at the uppermost point, with no support from below. What is the minimum speed required to perform a vertical loop if the radius of the chamber is 25 m ?

You may have seen in a circus a motorcyclist driving in a vertical loo

1.	You may have seen in a circus a motorcyclist driving in a vertical loop inside a 'death well' chamber with holes, so the spectators can watch from outside. Explain clearly why the motorcyclist does not drop down when he is at the uppermost point, with no support from below. What is the minimum speed required to perform a vertical loop if the radius of the chamber is 25 m ?
Answer» Solution :`mv^(2)//s = N + mg`, for minimum speed normal REACTION `N =0, v_("MIN") = SQRT(rg) = sqrt(25 XX 9.8) = 15.7 ms^(-1)`