badge image

Enroll For Free Now & Improve Your Performance.

×
User Icon
User Icon
User Icon
User Icon
User Icon

Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
Grade: 12

                        

We are given a wheel of readius "r" and mass "m" rotating about its axis with angular speed "v/r". If its radius is doubled, wat will be the change in net force acting on the particle at the rim ?? 1) mass is constant. 2) density is constant.

We are given a wheel of readius "r" and mass "m" rotating about its axis with angular speed "v/r". If its radius is doubled, wat will be the change in net force acting on the particle at the rim ??


1) mass is constant.


2) density is constant.

10 years ago

Answers : (1)

vikas askiitian expert
509 Points
							

since no external torque acting on the system so we can apply conservation of angular momentam...

Iw=I1w1 .........1

a)when mass is constant

eq 1 becomes

 mr2 w =m4r2w1

   w1=w/4 ..............1

the only force acting on the particle which is placed on rim is centrifugal force..

Fc=mw2 r               (initially)

Fc1=mw12 2r          (finally)

Fc1=mw2r/8=Fc/8

so force on particle becomes 1/8 times its initial value..

now solve other part in same manner

10 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


Course Features

  • 101 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution


Course Features

  • 110 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details