1.

You may have seen in a circus a motor-cyclist driving in verticle loops inside adeath-well' (a hollow sphericalchamber with holes, so the spectatorscan watch from outside). Explainclearly why the motorcyclist does notdrop down when he is at the upper-most point, with no support frombelow. What is the minimum speedrequired at the uppermost position toperform a verticle loop if the radius ofthe chamber is 25 m ?loath well

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