Home
Class 12
PHYSICS
A block of mass m is placed on a vertica...

A block of mass m is placed on a vertical fixed circular track and then it is given velocity v along the track at position A on track. The coefficient of friction between the block and the track varies with the angle `theta` . If the block moves on track with constant speed then the coefficient of friction is

A

`mu=(sintheta)/(cottheta+(v^(2))/(Rg))`

B

`mu=(sintheta)/(costheta+(v^(2))/(Rg))`

C

`mu=(tantheta)/(costheta+(v^(2))/(Rg))`

D

`mu=(costheta)/(tantheta+(v^(2))/(Rg))`

Text Solution

Verified by Experts

The correct Answer is:
B
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • NTA JEE MOCK TEST 45

    NTA MOCK TESTS|Exercise PHYSICS|25 Videos

  • NTA JEE MOCK TEST 47

    NTA MOCK TESTS|Exercise PHYSICS|25 Videos

Similar Questions

Explore conceptually related problems

A block of mass m slides down a smooth vertical circular track. During the motion, the block is in:

A block of mass m slides down a smooth vertical circular track. During the motion, the block is in

Knowledge Check

  • A block of mass m is placed on a circular track and then it is given a velocity upsilon vertically downwards at position A on track. If block moves on track with constant speed, then

    A
    Coefficient of friction between block and circular track as function of angle `theta` is `mu=(sintheta)/(cottheta+v^(2)/(Rg))`
    B
    Coefficient of friction between block and circular track as function of angle `theta` is `mu=(sintheta)/(costheta+v^(2)/(Rg))`
    C
    Instantaneous power due to friction is `-mgv sin theta`
    D
    Work done from A to C by friction on block will be `-mgR`

  • A block of mass m is placed at rest on an inclination theta to the horizontal.If the coefficient of friction between the block and the plane is mu , then the total force the inclined plane exerts on the block is

    A
    `mg`
    B
    `mu mg cos theta`
    C
    ` mg sin theta`
    D
    `mu mg tan theta`

  • Find the maximum velocity for skidding for a car moved on a circular track of radius 100 m . The coefficient of friction between the road and tyre is 0.2

    A
    `0.14 m//s`
    B
    `140 m//s`
    C
    `1.4 km//s`
    D
    `14 m//s`

    • Similar Questions

    Explore conceptually related problems

    A block of mass m is at rest on a rough inclined plane of angle of inclination theta . If coefficient of friction between the block and the inclined plane is mu , then the minimum value of force along the plane required to move the block on the plane is

    A block slides down a curved frictionless track and then up an inclined plane as in figure. The coefficient of kinetic friction between the block and incline is mu_k . Find the maximum height reached by the clock.

    A block of mass m is projected up with a velocity v_0 along an inclined plane of angle of inclination theta=37^@ . The coefficient of friction between the inclined plane AB and blocks is mu(=tan theta) . Find the values of v_0 so that the block moves in a circular path from B to C.

    A block slides down a curved frictionless track and then up an incline as shown in figure. The coefficient of kinetic friction between block and incline is mu . The maximum height reached by block is

    Particles is moving on circular track such that its angular velocity is constant then

    Home
    Profile