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 block of mass m is placed on a smooth inclined plane of inclination q with the horizontal. The force exerted by the plane on the block has a magnitude. (a) mg (b) mg/cos q (c) mg cos q (d) mg tan q

8 years ago

Answers : (6)

Anirban Mukherjee
47 Points
							

From FBD of the situations we get R= mg cos A

8 years ago
Aman Bansal
592 Points
							

Dea Jeet,

Consider a block of mass "m" placed on an inclined plane, which makes an angle q with the horizontal plane. The weight "W" of the block is acting vertically downward. The weight of the block can be resolved into two rectangular components:
wcos
q and wsinq
other forces acting on the block are:
(i) Surface reaction (R) which is perpendicular to the plane
(ii) Force of friction (f) acting opposite to the direction of motion of block.
Let us take x-axis perpendicular to the inclined plane. If the block is at rest, then wsinq acting down the plane balances the opposing frictional force.
Applying 1st condition of equilibrium.
For latest information , free computer courses and high impact notes visit : www.citycollegiate.com
Fx = 0
f – wsinq = 0 -------(1)
Fy = 0
R– wcosq = 0 -------(2)
Since there is no motion in the direction perpendicular to the inclined plane, therefore wcosq is balanced by R i.e. R = wcosq
If block slides down with an acceleration equal to ''a'', then the resultant force is equal to ''ma'' and the force on block will be:
wsinq – f
According to 2nd law of motion
wsinq – f = ma
If the force of friction is negligible, then
wsinq = ma
but w = mg
This expression shows that if friction is negligible the acceleration of a body on an inclined plane is independent of mass but is directly proportional to sinq.
WHEN FRICTION IS NOT NEGLIGIBLE
 
(i) If block moves upward
f - wsinq = ma
(ii) If block moves downward
wsinq – f = ma

Cracking IIT just got more exciting,It s not just all about getting assistance from IITians, alongside Target Achievement and Rewards play an important role. ASKIITIANS has it all for you, wherein you get assistance only from IITians for your preparation and win by answering queries in the discussion forums. Reward points 5 + 15 for all those who upload their pic and download the ASKIITIANS Toolbar, just a simple  to download the toolbar….

So start the brain storming…. become a leader with Elite Expert League ASKIITIANS

Thanks

Aman Bansal

Askiitian Expert

8 years ago
Chris Chan
33 Points
							

                            mg cos q - because the plane is horizontal...

8 years ago
G Ashwin -
24 Points
							you c
						
7 years ago
Neeraj nani
15 Points
							MgBecause all components depend on
						
one year ago
ankit singh
askIITians Faculty
596 Points
							
other forces acting on the block are:(i) Surface reaction (R) which is perpendicular to the plane(ii) Force of friction (f) acting opposite to the direction of motion of block.Let us take x-axis perpendicular to the inclined plane. If the block is at rest, then wsinq acting down the plane balances the opposing frictional force.Applying 1st condition of equilibrium.q and wsinq with the horizontal plane. The weight "W" of the block is acting vertically downward. The weight of the block can be resolved into two rectangular components:wcosqConsider a block of mass "m" placed on an inclined plane, which makes an angle 
2 months 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

  • 18 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