Home
Class 11
PHYSICS
A small particle of mass 0.36g rests on ...

A small particle of mass `0.36g` rests on a horizontal turntable at a distance `25cm` from the axis of spindle. The turntable is acceleration at rate of `alpha=(1)/(3)rads^(-2)` . The frictional force that the table exerts on the particle `2s` after the startup is

A

`40muN`

B

`30muN`

C

`50muN`

D

`60muN`

Text Solution

Verified by Experts

The correct Answer is:
C
`f=ma=msqrt(a_(t)^(2)+a_(r)^(2))`
`=msqrt((Ralpha)^(2)+(Romega)^(2))`
`=msqrt((Ralpha)^(2)+[R(alphat)^(2)]^(2))`
`=0.36xx10^(-3)sqrt((0.25xx(1)/(3))^(2)+[0.25((1)/(3)xx2)^(2)]^(2)`
`=50xx10^(-6)N`
`=50muN`
Promotional Banner

Topper's Solved these Questions

  • CIRCULAR MOTION

    DC PANDEY ENGLISH|Exercise Level 1 Subjective|13 Videos

  • CIRCULAR MOTION

    DC PANDEY ENGLISH|Exercise Level 2 Single Correct|18 Videos

  • CIRCULAR MOTION

    DC PANDEY ENGLISH|Exercise Assertion And Reason|28 Videos

  • CENTRE OF MASS, LINEAR MOMENTUM AND COLLISION

    DC PANDEY ENGLISH|Exercise Level 2 Subjective|21 Videos

  • COMMUNICATION SYSTEM

    DC PANDEY ENGLISH|Exercise Only One Option is Correct|27 Videos

Similar Questions

Explore conceptually related problems

A small particle of mass 0.36g rests on a horizontal turntable at a distance 25cm from the axis of spindle. The turntable is accelerated at rate of alpha=(1)/(3)rads^(-2) . The frictional force that the table exerts on the particle 2s after the startup is

A small coin of mass 40 g is placed on the horizontal surface of a rotating disc. The disc starts from rest and is given a constant angular acceleration alpha="2 rad s"^(-2) . The coefficient of static friction between the coin and the disc is mu_(s)=3//4 and the coefficient of kinetic friction is mu_(k)=0.5. The coin is placed at a distance r=1m from the centre of the disc. The magnitude of the resultant force on the coin exerted by the disc just before it starts slipping on the disc is?

A small trolley of mass 2.0 kg resting on a horizontal turntable is connected by a light spring to the centre of the table. When the turntable is set into rotation at a speed of 300 rev/min the length of the stretched spring is 40 cm. If the original length of the spring is 35 cm, determine the force constant of the spring.

A small coin of mass 80g is placed on the horizontal surface of a rotating disc. The disc starts from rest and is given a constant angular acceleration alpha=2rad//s^(2) . The coefficient of static friction between the coin and the disc is mu_(s)=3//4 and cofficient of kinetic friction is mu_(k)=0.5 . The coin is placed at a distance r=1m from the centre of the disc. The magnitude of the resultant force on the coin exerted by the disc just before it starts slipping on the disc is

A small coin of mass 80g is placed on the horizontal surface of a rotating disc. The disc starts from rest and is given a constant angular acceleration alpha=2rad//s^(2) . The coefficient of static friction between the coin and the disc is mu_(s)=3//4 and cofficient of kinetic friction is mu_(k)=0.5 . The coin is placed at a distance r=1m from the centre of the disc. The magnitude of the resultant force on the coin exerted by the disc just before it starts slipping on the disc is

A small coin of mass 5 g is placed at a distance 5 cm from centre on a flat horizontal turn table. The turn table is observed to make 3 revolutions in sqrt(10)s . The frictional force on the coin is (n xx 10^(-3)) N . Find value of n .

A particle of mass m moves along a horizontal circle of radius R such that normal acceleration of particle varies with time as a_(n)=kt^(2). where k is a constant. Total force on particle at time t s is

A particle of mass m moves along a horizontal circle of radius R such that normal acceleration of particle varies with time as a_(n)=kt^(2). where k is a constant. Tangential force on particle at t s is

A particle A having a charge of 2.0xx10 ^(-6) C is held fixed on a horizontal table. A second charged jparticle of mass 80g stays in equilibrium on the table at a distance of 10 cm from the firsst charge. The coefficient of friction between the table and this second jparticle is mu = 0.2 . find the range within which the charge of this second particle may lie.

A rough horizontal plate rotates with angular velocity omega about a fixed vertical axis. A particle or mass m lies on the plate at a distance (5a)/(4) from this axis. The coefficient of friction between the plate and the particle is (1)/(3) . The largest value of omega^(2) for which the particle will continue to be at rest on the revolving plate is