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: 11

                        

A time-varying force F=5N is applied on the block kept on a rough surface. Mass of the block is 10kg, coefficient of the static and kinetic friction between the block and the horizontal surface are 0.3 and 0.2 respectively. Take g=10m/s^2. Find the time at which slipping starts between blocks and the surface beneath it. (A) 3s (B) 4s (C) 5s (D) 6s

5 months ago

Answers : (1)

Arun
24742 Points
							
Assume no friction, the motion of the block will be in the direction of applied force. The friction opposes relative motion between two surfaces. The direction of friction will be opposite to relative motion, i.e., in leftward direction.
Now let us find the maximum friction force.
max
​ 
 =f 
lim
​ 
 =μ 
s
​ 
 N=0.2×1×10=2N
a. If F=1.0N
If the block is at rest friction acting on the block, f=F= 0.1N.
As f
lim
​ 
 , hence, friction will be of static nature and acceleration of the block will be zero.
b. If F= 0.2 N
Here the applied force equals limiting friction. The block is on the verge of slipping.
or f=f 
lim
​ 
 =2.0N
c. If F=2.5N
Here the applied force is greater then the magnitude of the maximum nature of static friction. The nature of friction between the block and ground is of kinetic nature.
or f=f 
k
​ 
 =μ 
k
​ 
 N=0.15×1×1.5N
5 months 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