A motor cyclist in a circus , drives in a vertical loop inside a death well . What is the minimum speed required to complete the vertical circle , without falling down to complete the vertical circle , without falling down at the highest point , if the radius of the death well is 5 m?
A
7m/s
B
5 m/s
C
10.5m/s
D
15 m/s
Text Solution
Verified by Experts
The correct Answer is:
A
For completing the vertical circle , the minimum speed of the cyclist a the highest point is calculated from C.P force = Weight of the motor cycle +Motor cyclist `or (Mv^(2))/(r ) = mg ` ` therefore v= sqrt(rg) = sqrt(5xx9.8 )= sqrt(49)=7 m//s `
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