Question

In a circus a person is performing stunts in a well of the death of the radius =20m and his time period of the rotating is t=20m sec ,then it's average speed is............................

Answer 1

When the motorcyclist is at the highest point of the death - well, the normal reaction R on the motorcyclist by the ceiling of the chamber acts downwards. His weight mg also act downwards.

F

net

=ma

c

⇒R+mg=

r

mv

2

Here v is the speed of the motorcyclist and m is the mass of does not fall down. The minimum speed required to perform a vertical loop is given by equation (1) when R=0.

Therefore,

mg=

r

mv

min

2

orv

min

2

=grorv

min

=

gr

=

9.8×25m/s

=15.65m/s.

So, the minimum speed, at the top, required to perform a vertical loop is 15.65 m/s.

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