Assignment 1- Class:10 Subject:Science

 

Assignment

Class:10                                                                                  Subject:Science

Physics

UNIT-1 Laws of motion Part – A

I. Choose the correct answer

1.  Inertia of a body depends on--------------

 

a) Weight of the object                                 b) acceleration due to gravity

 

c) mass of the object                                    d) Both a and b

 2.  In a rocket, a large volume of gases produced by the combustion of fuel is allowed to escape through its tail nozzle in the downward direction with the tremendous speed and makes the rocket to move upward. Which principle is followed in this take off of the rocket?

a) Moment of inertia                           b) Conservation of momentum

 c) Newton’s first law of motion           d) Newton’s law of gravitation

 3.  There are two statements

 A)   Newton’s first law is valid from the pilot in an aircraft which is taking off

 B)   Newton’s first law is valid from the observer in a train moving with constant velocity

Which of the following is correct?

 a) A only              b) B only              c) Both A and B       d) Both A and B wrong

 4.    Which of the following law is used to discover new stars and planets?

 a) Newton's first law                          b) Newton's second  law

c) Newton's third law                         d) Newton's law of gravitation

 

5.  The Resultant force of two equal parallel forces acting in opposite direction in the same line of action is

 

a) Fnet = F₁ + F₂                                  b) Fnet = F₂-F₁

 

c) Fnet = F₂+F₁                                   d) Fnet=0

 

Part – B

II.  Short Answer

6.  Define Inertia. Give its classification

7.   If a 5N and a 15N forces are acting opposite to one another. Find the resultant force and the direction of action of the resultant force.

8.   State Newton’s second law.

 

Part – C

III.  Write in Detail

9. What are the types of Inertia? Give an example for each type.