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: 9
        

A spring balance hanging in steady state inside a lift accelerating upwards shows a reading of double the actual mass of an object. Then the acceleration of the lift is-


(a)    √5g


(b)    2g


(c)     g


(d)    √3g              pls explain!!!!

7 years ago

Answers : (3)

shubham pansare
15 Points
							

initially,, kx=mg   -(1)

later double the reading...

2kx=m(g+a)          

2mg=m(g+a)....use (1)

therefore a=g.

7 years ago
vikas askiitian expert
509 Points
							

when lift acclerates it upward direction then ,then particle experinces a seudo force in downward direction

magnitude of this force = ma                     (a is accleration of lift)

net force in downward direction = net weight

weight = m(g+a)

weight is given 2mg so

2mg = m(g+a)

 a = g

7 years ago
Fawz Naim
37 Points
							

as the lift is accelerating upwards a pseudo force is acting on the mass hanging from the spring balance.

let the acc of the lift be a    and the mass of the body be m

so the total downward force acting on the object =weightof the object+pseudo force(ma)

F=mg+ma

now the spring balance is showing the mass of the object which is double its actual mass

so  F=2mg

mg+ma=2mg

ma=mg

a=g 

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

Get Extra Rs. 551 off

COUPON CODE: SELF20


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


Get Extra Rs. 594 off

COUPON CODE: SELF20

Ask Experts

Have any Question? Ask Experts

Post Question

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