Mechanical Engineering - Engineering Mechanics - Discussion
Discussion Forum : Engineering Mechanics - Section 2 (Q.No. 7)
7.
The minimum force required to slide a body of weight W on a rough horizontal plane is
Discussion:
49 comments Page 3 of 5.
Somesh said:
6 years ago
Answer C is correct, because it is a case of body slide down an inclined plane. Incase of the horizontal answer, A is correct.
Yugal said:
6 years ago
The answer is A.
The minimum force required to slide a body of weight W on a rough horizontal plane is W sinϴ. A body of weight W is required to move up the rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by P = W (sinα + μ cosα).
The minimum force required to slide a body of weight W on a rough horizontal plane is W sinϴ. A body of weight W is required to move up the rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by P = W (sinα + μ cosα).
Rajkishore mohanta said:
6 years ago
The correct answer is option A.
Vinay BEL said:
5 years ago
I think it is W sin θ.
Sandaz said:
4 years ago
Yes, the Correct answer is tan(θ). Those who are saying cosθ' and sinθ, that is for inclined plane and not for horizontal surface. Here in question, it is only horizontal surface, so it's option C.
Dhananjay said:
4 years ago
@Sandaz.
But we don't if the force applied is horizontal or at an angle to the surface.
But we don't if the force applied is horizontal or at an angle to the surface.
Gaurav1995 said:
9 years ago
Given ans is absolutely correct.
The body lies on a horizontal plane. So to slide the body force has to overcome a limiting frictional force of the body.
i.e. F = uW where, u = coeff of friction = Tanθ (θ = friction angle).
The body lies on a horizontal plane. So to slide the body force has to overcome a limiting frictional force of the body.
i.e. F = uW where, u = coeff of friction = Tanθ (θ = friction angle).
Amit said:
1 decade ago
Weight w acts downward so that to move weight w we should only give force equals to frictional force. It will be wtanthita.
Roni said:
1 decade ago
F equals to uR and u equals to tan of angle of friction. And R equals to W for horizontal plane. On this perspective, it should be the option (C).
Saikumar said:
1 decade ago
Answer should be A as when force applied to slide a body at an angle theta.
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