Home
Class 12
PHYSICS
A hollow sphere has radius 6.4 m. Minimu...

A hollow sphere has radius 6.4 m. Minimum velocity required by a motor cyclist at bottom to complete the circle will be.

A

`17.7 m//s`

B

`10.2 m//s`

C

`12.4 m//s`

D

`16.0 m//s`

Text Solution

Verified by Experts

The correct Answer is:
A
`V = sqrt(5gR)=17.7m//s`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • DAILY PRACTICE PROBLEM

    RESONANCE|Exercise DPP No.34|9 Videos

  • DAILY PRACTICE PROBLEM

    RESONANCE|Exercise DPP No.35|20 Videos

  • DAILY PRACTICE PROBLEM

    RESONANCE|Exercise DPP No.32|9 Videos

  • CURRENT ELECTRICITY

    RESONANCE|Exercise High Level Problems (HIP)|21 Videos

  • ELECTRO MAGNETIC WAVES

    RESONANCE|Exercise Exercise 3|27 Videos

Similar Questions

Explore conceptually related problems

A small sphere of mass m = 0.6 kg carrying a positive charge q = 80 muC is connected with a light, flexible, and inextensible string of length r = 30 cm and whirled in a vertical circle. If a horizontal rightward electric field of strength E = 10^5 NC^-1 exists in the space, calculate the minimum velocity of the sphere required at the highest point so that it may just complete the circle (g = 10 ms^-2) .

A mass m is tied to a string of length l and is rotated in a vertical circle with centre at the other end of the string. (a) Find the minimum velocity of the mass at the top of the circle so that it is able to complete the circle. (b) Find the minimum velocity at the bottom of the circle corresponding to the above condition.

Knowledge Check

  • A fighter plane is moving in a vertical circle of radius 'r'. Its minimum velocity at the highest point of the circle will be

    A
    `sqrt(3gr)`
    B
    `sqrt(2 gr)`
    C
    `sqrt(gr)`
    D
    `sqrt(gr//2)`

  • 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

  • A hollow sphere of radius 1m is given a positive charge of 10µC. The electric field at the centre of hollow sphere will be :

    A
    `60 xx 10^(3) Vm^(-1)`
    B
    `90 xx 10^(3) Vm^(-1)`
    C
    Zero
    D
    Infinite

    • Similar Questions

    Explore conceptually related problems

    In a circus , the diameter of globe of death is 20 m . From what minimum height must a motor cyclist start in order to go around the globe successfully ? .

    A motorcyclist rides in vertical circles in a hollow sphere of radius 5 m. Find the required minimum speed and minimum angular speed, so that he does not lose contact with the sphere at the highest point .

    A hollow sphere is rolled up with velocity V_0 = 6 m s^(- 1) from the bottom of inclined plane without slipping as shown in figure. What is the time taken (in s) by the sphere to return to its initial position?

    A bob of mass m, suspended by a string of length l_(1) is given a minimum velocity required to complete a full circle in the vertical plane. At the highest point, it collides elasticallywith another bob of mass 2m suspended by a string of length l_(2) , which is initially at rest. Both strings are massless and inextensible. If the second bob, after collision acquires the minimum speed required to complete a full circle in the vertical plane, the ratio l_(2)//l_(1) is (5//4) n. The value of n is

    A bucket of water is being removled in vertical circle of radius 1m. Minimum frequency required to prevent the water from getting down the path is

    Home
    Profile