IIT JEE Questions And Answers :: Laws Of Motion: part1



IIT JEE : Laws Of Motion QUESTIONS AND ANSWERS :: part1 : 1 to 5

Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2014 examinations :

1.A block of mass 4 kg is kept on a rough horizontal surface. The coefficient of static friction is 0.8. If a force of 19 N is applied on the block parallel to the floor, then the force of friction between the block and floor is:

32N
18N
19N
9.8N

2.A body is at rest on the surface of the earth. Which of the following statements is correct?

No force is acting on the body
Only weight of the body acts on it
Net downward force is equal to the net upward force
None of the above statement is correct

3.A chain lies on a rough horizontal table. It starts sliding when one-fourth of its length hangs over the edge of the table. The coefficient of static friction between the chain and the surface of the table is:

1/2
1/3
1/4
1/5

4.An open knife edge of mass 200 g is dropped from height 5 m on a cardboard. If the knife edge penetrates distance 2 m into the cardboard, the average resistance offered by the cardboard to the knife edge is:

7N
25N
35N
none of these

5.A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads 49 N, when the lift is stationary. If the lift moves downward with an acceleration of 5 m/square second, the reading of the spring balance will be:

24N
74N
15N
49N

More Laws Of Motion QUESTIONS AND ANSWERS available in next pages

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