Question

The diameter of the globe of death in a circus is 30 m. At what minimum velocity a motor cyclist should start in order to go round the globe successfully?

Answer 1

Answer:

At highest point of globe of death , the energy equation will be

mg2R+

2

1

mv

2

=mgh

Where R is the radius of the globe of death.

We also know at highest point mototcyclist needs to cancel gravityto prevent from falling down.

Which will be provided by the centripetal acceleration.

Thus

Rv2

=gv 2 =Rg

substituting it in the energy equation and solving we get

h=5 /2R

h=75m

Answer 2

Answer:

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