What is the center of mass?

10th ICSE MCQ The center of mass is a position defined relative to an object or system of objects. It is the average position of all the parts of the system, weighted according to their masses. For simple rigid objects with uniform density, the center of mass is located at the centroid.

Centre of mass of a system is the point that behaves as whole mass of the system is concentrated at it and all external forces are acting on it. For rigid bodies, centre of mass is independent of the state of the body i.e., whether it is in rest or in accelerated motion centre of mass will remain same.

10th ICSE MCQ What is the formula of center of mass?

Center of Mass of a Two-Particle System

(m₁+m₂) r_cm =m₁ r₁+m₂ r₂. The product of the total mass of the system and the position vector of the center of mass is equal to the sum of the products of the masses of the two particles and their respective position vectors.

The center of mass ‘s main characteristic is that it appears to carry the whole mass of the body. The total mass x the position of the center of mass= ∑ mass of the individual particle x the position of the particle. The center of mass is a geometric point in three-dimensional volume.

Where is centre of mass used in real life?

Calculating the location of the center of mass is important because it allows you to analyze dynamics problems based on the motion of the center of mass. For example, if a hammer is thrown in the air, its center of mass will follow a parabolic path. It’s the same as if a particle were thrown in the air.

What are the characteristics of centre of mass?

The center of mass ‘s main characteristic is that it appears to carry the whole mass of the body. The total mass x the position of the center of mass= ∑ mass of the individual particle x the position of the particle. The center of mass is a geometric point in three-dimensional volume.

What is difference between centre of mass and Centre of gravity?

Gravity is found in every object. The center of gravity is the point at which the act of gravity takes place. In humans, the mass is concentrated.
…
Centre of Gravity.

S.NO.	CENTRE OF MASS	CENTRE OF GRAVITY
1.	The center of mass focuses on the mass of the body.	The center of gravity focuses on the weight of the body.

What do you mean by rotational motion?

If all the particles of a rigid body perform circular motion and the centres of these circles are steady on a definite straight line called axis of rotation, then the motion of the rigid body is called the rotational motion.In simple words, we can say that rotational motion is defined as the motion of an object in a

Which is an example of rotational motion?

Rotational motion Examples

Motion of wheel, gears, motors, etc is rotational motion. Motion of the blades of the helicopter is also rotatory motion. A door, swiveling on its hinges as you open or close it. A spinning top, motion of a Ferris Wheal in an amusement park.

MCQ ON ROTATIONAL MOTION AND CENTER OF MASS – 1

ANSWER KEY

1. 3
2. 2
3. 2
4. 4
5. 4
6. 2
7. 1
8. 4
9. 4
10. 4
11. 3
12. 4
13. 1
14. 2
15. 2
16. 3
17. 3
18. 2
19. 3
20. 1

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10th ICSE MCQ