Question

1. Define centre of mass of a body .

2. Write expression for conservation of momentum in terms of centre

of mass?

3. Is centre of mass always a reality ?

4. What do you mean by rigid body?

5. What is the relationship between escape velocity and orbital

velocity . [2]

6. Give an example where centre of mass lies inside the body and

outside the body

7. Obtain the relation between torque ,and moment of inertia

8. Write newton’s law of graviation .

9. What do you mean by escape velocity ?

10.Prove on moving above the earth surface value of g decreases ?

11.Obtain expression for rotational kinetic energy ?

12. The moment of ineria of a fly wheel is 4 kg /m2 . what angular accelration will be produced in it by applying a torque of 10 Nm. on it.

13. What do you mean by gravitational potential , obtain expression for it .

Answer 1

Answer:

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Manjula Parelkar was a deformed girl. She was born with two fingers each for both her hands

The Warriors novel series is written by Erin Hunter. Due to the large number of characters present in the novel series, this list is divided by Clan, e.g., all characters in ThunderClan (as of The Silent Thaw) are put together in the allegiances list.

Answer 2

Answer:

Mexico, officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatemala, Belize, and the Caribbean Sea; and to the east by the Gulf of Mexico.