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.

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

Total Price: Rs.

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


a uniform object ladder of length 3.5 m and weighing 250n is placed against a smoth vertical wall with its lower end 1.25 m from the wall . if coefficent of friction between the ladder and floror is 0.3 , then the frictional force acting on the ladder at that point of contact betweenh ladder and floor

3 years ago

Answers : (1)

Vikas TU
12154 Points
Dear student 
W is the weight of the ladder, acting downwards on the center of mass of the ladder. N is the normal reaction from the ground on the ladder and f is the friction offered by the ground to the ladder.
Consider the topmost point of the ladder as our reference point.
Now, we assume that the ladder is at rest. So, the torques due to different forces will cancel out each other. Considering our reference point, the torque due to the weight of ladder is W x (1.25)/2
The torque due to normal reaction from the ground is N x 1.25
The torque due to friction is 3(by pythagoras theorem) x f.
Now, there is no force acting in vertical direction on the ladder other than its weight. So, the normal reaction, N=W.
Now, by equating the clockwise and anticlockwise torques, we get f=52.0833333N (nearly equal to 52.1N).
I hope this helps you.
Feel free to ask if you don't get it.
one year ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies

Course Features

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

Course Features

  • 728 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
To Win!!! Click Here for details