MY CART (5)

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

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: R

There are no items in this cart.
Continue Shopping
Menu
zahid sharief Grade: 11
        

please tell me how to solve this one


two personsare holding a massless ropetightly at its ends so that it is horizontal. a 15 kg weight is attached at its midpt which now no longer horizontal. the min tension required to completely straighten the rope is-(ans-infinite)

6 years ago

Answers : (1)

Puneet Mittal AskiitiansExpert-IITD
22 Points
										

Hi Zahid,


Let alpha be the angle which the rope is making with the vertical when weight is attached at its mid-point.


let the tension in the rope be T.


The 2Tcos(alpha) = mg ( by using Force balance in vertical direction for the weight )


 T = mg/(2*cos(alpha))


Now when the rope is straight then , alpha is 90 degrees.


cos(alpha) = cos(90 degree) = 0


T = mg/( 0 ) = Infinite


Please feel free to ask as many questions you have.


Puneet

6 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies
  • Complete Physics Course - Class 12
  • OFFERED PRICE: R 2,600
  • View Details
Get extra R 520 off
USE CODE: MOB20
  • Complete Physics Course - Class 11
  • OFFERED PRICE: R 2,800
  • View Details
Get extra R 560 off
USE CODE: MOB20

Ask Experts

Have any Question? Ask Experts

Post Question

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