Define centroid and centre of gravity.

Define centroid and centre of gravity.
by
retagged

1 Answer

Answer :

Centroid: It is defined as the point through which the entire area of a plane figure is assumed to act, for all positions of the lamina. e. g. Triangle, Square. 

Centre of Gravity: It is defined as the point through which the whole weight of the body is assumed to act, irrespective of the position of a body. e.g. Cone, Cylinder.
by

Related questions

Why do we call the theory of gravity a theory and not a law?

Description : Why do we call the theory of gravity a theory and not a law?

Last Answer : I’ve always heard it referred to as the law of gravity.

If we were to take all of the humans on Earth and tape them together, creating one big ball, how strong will our gravity be?

Description : If we were to take all of the humans on Earth and tape them together, creating one big ball, how strong will our gravity be?

Last Answer : Depends on the kind of tape being used.

If photons have no mass, why are they affected by gravity? (Strange Universe series)

Description : If photons have no mass, why are they affected by gravity? (Strange Universe series)

Last Answer : answer:Perhaps the conditional is dependent upon having an anti particle, of which the photon has none, allowing it to be simultaneously both wave and particle. But that hypothesis would be ... which creates the gravity lens. Could be a unique property of not having an antiparticle counterpart.

What would you do if you could control gravity?

Description : What would you do if you could control gravity?

Last Answer : I would fly over a group of pigeons….

GRAVITY FACTS

Description : GRAVITY FACTS

Last Answer : Around the Hudson Bay in Quebec, Canada, there is less gravity than on most of the other parts of Earth. In the movie Apollo 13, the zero-gravity scenes are real. The crew filmed about four hours ... If Jupiter had more gravity when the solar system was created, it could have become a second sun.

Write one advantage and one disadvantage each for spring control method and gravity control method.

Description : Write one advantage and one disadvantage each for spring control method and gravity control method.

Last Answer : Advantages of Spring Control Method: 1) The spring-controlled meters may be used in any position. 2) In some instruments, springs can be used as current leads. 3) As springs are light in weight ... only. 2) Scale is non-uniform. 3) Control weights add to the weight of instrument.

The center of gravity of a triangle lies at the point of?

Description : The center of gravity of a triangle lies at the point of?

Last Answer : The center of gravity of a triangle lies at the point of concurrence of the medians.

Center of gravity of a thin hollow cone lies on the axis at a height of?

Description : Center of gravity of a thin hollow cone lies on the axis at a height of?

Last Answer : Center of gravity of a thin hollow cone lies on the axis at a height of one-third of the total height above base.

Center of gravity of a solid cone lies on the axis at the height?

Description : Center of gravity of a solid cone lies on the axis at the height?

Last Answer : Center of gravity of a solid cone lies on the axis at the height one-fourth of the total height above base.

The center of gravity of a uniform lamina lies at?

Description : The center of gravity of a uniform lamina lies at?

Last Answer : The center of gravity of a uniform lamina lies at the mid point of its axis.

The gravity controlled instrument has crowded scale because current is proportional to?

Last Answer : The gravity controlled instrument has crowded scale because current is proportional to sine of deflection angle.

How is it possible for a gravitational force to warp space-time around itself?

Description : How is it possible for a gravitational force to warp space-time around itself?

Last Answer : It's a little useless to speculate why a law of physics exists, isn't it? I don't think there's a reason; it's like asking why the speed of light is what it is. I guess it's arbitrary, ... whatever. Why does gravity warp spacetime? Fuck if i know, it just does. Maybe I don't understand the question.

What is your top 10 list of worst movies of 2013?

Description : What is your top 10 list of worst movies of 2013?

Last Answer : answer:I was way too broke to see 10 new films this year, but these were pretty awful: Mama Oz the Great and Powerful

Why is this satellite going to fall from the sky? And how can they predict the day so accurately ?

Description : Why is this satellite going to fall from the sky? And how can they predict the day so accurately ?

Last Answer : The force it exerts while spinning around the earth that counters gravity is what kept it up. The satellite was actually more or less decommisioned back in 2004(?) and its inertia has finally worn off to the point where gravity is now reeling it in for the kill so to speak.

Here's one to keep us on our toes. What's your gut feel about GUT and TOE? (see details)

Description : Here's one to keep us on our toes. What's your gut feel about GUT and TOE? (see details)

Last Answer : answer:I think any postualting on when is a bit premature. I can't help but feel that there are a few missing pieces of the puzzle yet and that many of our assumptions will have to be ... wealthiest nation sitting it out for the large part. Great question. I predict much fun in this thread

How can 3-dimensional space be curved in a 2-dimensional plane cut through it?

Description : How can 3-dimensional space be curved in a 2-dimensional plane cut through it?

Last Answer : A doughnut, its the only shape space could take in which all physical laws still apply.

Can you jump off of a falling object before hitting the ground and save yourself?

Description : Can you jump off of a falling object before hitting the ground and save yourself?

Last Answer : Since you would already be falling down together with the object at the same speed as the object, jumping off the object would at best result in a minimally diminished impact velocity, assuming your ... a watermelon with your brain splashing out like jelly. And you would die, too, most certainly.

How long until a new planet forms in the asteroid belt?

Description : How long until a new planet forms in the asteroid belt?

Last Answer : A very long time, it at all, because, contrary what you see in movies, the asteroid belt is not a place where you fly in with a small ship and have to vigorously dodgel big rocks to avoid ... rocks are so far apart, that it is extremely unlikely to crash into one without precisely aiming for one.

The line of action of the buoyant force acts through the (A) Centroid of the displaced volume of fluid (B) Centre of gravity of a submerged body (C) Centroid of the volume of any floating body (D) None of these

Description : The line of action of the buoyant force acts through the (A) Centroid of the displaced volume of fluid (B) Centre of gravity of a submerged body (C) Centroid of the volume of any floating body (D) None of these

Last Answer : (A) Centroid of the displaced volume of fluid

The line of action of the buoyant force acts through the (A) Centroid of the volume of fluid vertically above the body (B) Centre of the volume of floating body (C) Center of gravity of any submerged body (D) Centroid of the displaced volume of fluid

Description : The line of action of the buoyant force acts through the (A) Centroid of the volume of fluid vertically above the body (B) Centre of the volume of floating body (C) Center of gravity of any submerged body (D) Centroid of the displaced volume of fluid

Last Answer : Answer: Option D

A sphere of radius r is cut from larger sphere of radius R. The distance between their centre is a. The centroid of the remaining valoume lies on the line of centres and the sistanc from the centre of the larger sphere is a.ar2 / (R2 - r2) b.107 dynes c.aR/(R2-r2) d.aR/(R - r) e.ar3 / (R3 - r3)

Description : A sphere of radius r is cut from larger sphere of radius R. The distance between their centre is a. The centroid of the remaining valoume lies on the line of centres and the sistanc from the centre of the larger sphere is a.ar2 / (R2 - r2) b.107 dynes c.aR/(R2-r2) d.aR/(R - r) e.ar3 / (R3 - r3)

Last Answer : e. ar3 / (R3 - r3)

Centre of pressure of a plane surface of arbitrary shape immersed vertically in a static mass of fluid(A) Lies above the centroid of the plane surface(B) Is independent of the specific weight of the fluid(C) Is different for different fluids(D) Is at the centroid of the plane surface

Description : Centre of pressure of a plane surface of arbitrary shape immersed vertically in a static mass of fluid (A) Lies above the centroid of the plane surface (B) Is independent of the specific weight of the fluid (C) Is different for different fluids (D) Is at the centroid of the plane surface

Last Answer : (B) Is independent of the specific weight of the fluid

The centre of pressure is (A) Always below the centroid of the area (B) Always above the centroid of the area (C) A point on the line of action of the resultant force (D) At the centroid of the submerged area

Description : The centre of pressure is (A) Always below the centroid of the area (B) Always above the centroid of the area (C) A point on the line of action of the resultant force (D) At the centroid of the submerged area

Last Answer : (C) A point on the line of action of the resultant force

Pick up the correct statement from the following: (A) For channels, the shear centre does not coincide its centroid (B) The point of intersection of the bending axis with the cross section of the beam, is called shear centre (C) For I sections, the shear centre coincides with the centroid of the cross section of the beam (D) All the above

Description : Pick up the correct statement from the following:  (A) For channels, the shear centre does not coincide its centroid  (B) The point of intersection of the bending axis with the cross section ... shear centre coincides with the centroid of the cross section of the beam  (D) All the above

Last Answer : (D) All the above

Define force system. Explain three force systems with sketches.

Description : Define force system. Explain three force systems with sketches. 

Last Answer : When two or more forces acting on a body, they are said to form a system of forces or force system.  Force systems with sketches: 1. Coplanar Collinear force system: The force system in ... planes and they do not possess one single point of concurrency are known as General force system.

Define free body diagram

Description : Define free body diagram

Last Answer : When all active and reactive forces acting on the free body are shown and thus the diagram obtained is called as „free body diagram‟. 

Define Scalar and Vector quantity.

Description : Define Scalar and Vector quantity. 

Last Answer : Scalar Quantity: A physical quantity having only magnitude but no direction is called as scalar quantity Vector Quantity: A physical quantity having both magnitude as well as direction is called as vector quantity. 

Define force and state its effects.

Description : Define force and state its effects.

Last Answer : Force: It is an external agency either push or pull which changes or tends to change the state of rest or of uniform motion of a body, upon which it acts. Effects of force : i) It may change the state ... It may turn or rotate the body on which it acts. iv) It may deform the body on which it acts.

State law of machine and explain its significance.

Description : State law of machine and explain its significance.

Last Answer : When we are using a machine to lift a weight, the work done is governed by the Law of Machine, which states that when on a machine (p) an effort is applied It has to be equal to the weight (w) of the load it will be lifting. Hence, p = mw + c where m and c are positive constants of the machine.

State two limitations of Lami’s theorem.

Description : State two limitations of Lami’s theorem.

Last Answer : 1. The theorem is applicable only if the body is in equilibrium. 2. The theorem is not applicable for parallel or non-concurrent force system. 3. The theorem is not applicable for more or less than three concurrent forces. 4. The theorem is not applicable for non-coplanar forces. 

State four laws of static friction.

Description : State four laws of static friction. 

Last Answer : 1. The frictional force is always acts tangential to the plane of contact and in the opposite direction of motion. 2. When the body is in limiting equilibrium, the ratio of limiting friction to ... is a self-adjusting force and it increases as the applied force increases up to limiting friction. 

State Law of polygon of forces.

Description : State Law of polygon of forces.

Last Answer : This law states that, If number of coplanar concurrent forces acting simultaneously on a body, be represented in magnitude and direction by the sides of polygon taken in same order, then their ... of the resultant. Measure angle , which gives the direction of resultant with the horizontal. 

Write relation between resultant and equilibrant.

Description : Write relation between resultant and equilibrant.

Last Answer : Equilibrant is always equal in magnitude, opposite in direction and collinear to the resultant.

Write two advantages and two disadvantages of friction.

Description : Write two advantages and two disadvantages of friction.

Last Answer : They change the direction  of the objects  They change the size of the objects

State characteristics of force.

Description : State characteristics of force.

Last Answer : i) Magnitude: The quantity of force e.g. 10 N, 100 kN etc.  ii) Direction: It is the line along which the force acts. It is also called as line of action of the force.  iii) Point of ... .  Push: If the arrow head is pointed towards the point of application, the nature of the force is push.

Is there a formula to find the center (center of mass/centroid) of 3 dimensional objects?

Description : Is there a formula to find the center (center of mass/centroid) of 3 dimensional objects?

Last Answer : Yes

The centroid of the area between the circle x2 + y2 = 16 and the line x + y = 4 will have the coordinates a.(4, 2) b.(2, 4) c.(2.34, 2.34) d.(1.16, 1.16) e.None of the above

Description : The centroid of the area between the circle x2 + y2 = 16 and the line x + y = 4 will have the coordinates a.(4, 2) b.(2, 4) c.(2.34, 2.34) d.(1.16, 1.16) e.None of the above

Last Answer : c. (2.34, 2.34)

Centroid of the are of circle shown in adjacement figure is a.r sin (?/2)/2 ?, 0 b.r sin (?)/?, 0 c.2 r sin (?/2)/?, 0 d.107 dynes e.2r sin (?)/?, 0

Description : Centroid of the are of circle shown in adjacement figure is a.r sin (?/2)/2 ?, 0 b.r sin (?)/?, 0 c.2 r sin (?/2)/?, 0 d.107 dynes e.2r sin (?)/?, 0

Last Answer : c. 2 r sin (?/2)/?, 0

The x coordinate of the centroid of the area enclosed by the parabolas y = x2 and x = y2 will be a.107 dynes b.0.44 c.0.43 d.0.45 e.0.46

Description : The x coordinate of the centroid of the area enclosed by the parabolas y = x2 and x = y2 will be a.107 dynes b.0.44 c.0.43 d.0.45 e.0.46

Last Answer : d. 0.45

The centroid of a triangle is at the inter-section of a.perpendicular bisectors b.107 dynes c.base and perpendicular from opposite vertex d.perpendiculars down from the corners e.medians

Description : The centroid of a triangle is at the inter-section of a.perpendicular bisectors b.107 dynes c.base and perpendicular from opposite vertex d.perpendiculars down from the corners e.medians

Last Answer : e. medians

The y-coordinate of the centroid of the area bounded by the x-axis, the line x = 3 and the parabola y = x2 will be a.2.7 b.2.55 c.107 dynes d.2.6 e.2.65

Description : The y-coordinate of the centroid of the area bounded by the x-axis, the line x = 3 and the parabola y = x2 will be a.2.7 b.2.55 c.107 dynes d.2.6 e.2.65

Last Answer : a. 2.7

If the distance from the vertex to the centroid of an equilateral triangle is 6 cm, then what is the area of the triangle? -Maths 9th

Description : If the distance from the vertex to the centroid of an equilateral triangle is 6 cm, then what is the area of the triangle? -Maths 9th

Last Answer : (b) 27√3 cm2.Let G be the centroid of ΔPQR. Then, PG = 6 cm.Now, \(rac{PG}{GS}\) = \(rac{2}{1}\) ⇒ GS = 3 cm∴PS = PG + GS = 9 cm (i)∴ If a is the length of a side of ΔPQR, then ... = 6√3 cm∴ Area of equilateral ΔPQR = \(rac{\sqrt3}{4}\) (a)2= \(rac{\sqrt3}{4}\) x (6√3)2 cm2 = 27√3 cm2.

G is the centroid of ΔABC with height h units. If a line DE parallel to BC cuts ΔABC at a height h/4 from BC, find the distance GG' in terms of AG -Maths 9th

Description : G is the centroid of ΔABC with height h units. If a line DE parallel to BC cuts ΔABC at a height h/4 from BC, find the distance GG' in terms of AG -Maths 9th

Last Answer : answer:

There are two congruent triangles each with area 198 cm^2. Triangle DEF is placed over triangle ABC in such a way that the centroid of -Maths 9th

Description : There are two congruent triangles each with area 198 cm^2. Triangle DEF is placed over triangle ABC in such a way that the centroid of -Maths 9th

Last Answer : answer:

The co-ordinates of mid-points of sides of a triangle are (1, 2), (0, –1) and (2, –1). Find its centroid. -Maths 9th

Description : The co-ordinates of mid-points of sides of a triangle are (1, 2), (0, –1) and (2, –1). Find its centroid. -Maths 9th

Last Answer : ABCD is a parallelogram, if the mid-points of diagonals AC and BD have the same co-ordinates (∵ Diagonals of a parallelogram bisect each other)Co-ordinates of mid-point of AC are \(\bigg(rac{a+2}{2},rac{-11+15}{2}\bigg)\) = \(\bigg(rac ... \(rac{a+2}{2}\) = 3 and 2 = \(rac{b+1}{2}\) ⇒ a = 4, b = 3.

If (0, 0) and (2, 0) are the two vertices of a triangle whose centroid is (1, 1), then the area of the triangle is: -Maths 9th

Description : If (0, 0) and (2, 0) are the two vertices of a triangle whose centroid is (1, 1), then the area of the triangle is: -Maths 9th

Last Answer : (b) \(\bigg(rac{2\sqrt{13}+20\sqrt2}{\sqrt{13}+\sqrt{17}+5\sqrt2},rac{8\sqrt{13}-6\sqrt{17}}{\sqrt{13}+\sqrt{17}+5\sqrt2}\bigg)\)Let A(x1, y1), B(x2, y2), C(x3, y3) be the vertices of ΔABC the ... +6)^2}\) = \(\sqrt{4+196}\) = \(\sqrt{200}=10\sqrt{2}\)∴ Co-ordinates of incentre of Δ ABC are

which statement is true the centroid and the circumcenter are the same point?

Description : which statement is true the centroid and the circumcenter are the same point?

Last Answer : the centroid is the balance point of the triangle

what- Point X is the centroid of the triangular plate.Which measure cannot be calculated from the information given?

Description : what- Point X is the centroid of the triangular plate.Which measure cannot be calculated from the information given?

Last Answer : XP

Is this statement true or falseThe centroid of a triangle is the point of concurrency of the medians of the triangle?

Description : Is this statement true or falseThe centroid of a triangle is the point of concurrency of the medians of the triangle?

Last Answer : 1

what- Point M is the centroid of which figure?

Description : what- Point M is the centroid of which figure?

Last Answer : figure 2