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



IIT JEE : Laws Of Motion QUESTIONS AND ANSWERS :: part1 : 6 to 10

Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2024 examinations :

6.A machine gun fires 10 bullets/s, each of mass 10g, the speed of each bullet is 20 cm/s, then force of recoil is:

200 dyne
2000 dyne
20 dyne
none of these

7.A block is moving up an inclined plane of inclination 60 degree with velocity of 20 m/s and stops after 2.00 s. If g = 10 m/second square then the approximate value of coefficient of friction is:

3
3.3
0.27
0.33

8.A block A of mass 2 kg rests on another block B of mass 8 kg which rests on a horizontal floor. The coefficient of friction between A and B is 0.2 while that between B and floor is 0.5. When a horizontal force 25 N is applied on the block B, the force of friction between A and B is:

zero
3.9 N
5.0 N
49 N

9.Starting from rest, a body slides down a 45 degree inclined plane in twice the time it takes to slide down the same distance in the absence of friction. The coefficient of friction between the body and the inclined plane is:

0.33
0.25
0.75
0.80

10.A block of mass 2 kg is placed on the floor. The coefficient of static friction is 0.4. If a force of 2.8 N is applied on the block parallel to floor, the force of friction between the block and floor is: (Take g = 10 m/second square)

2.8N
8N
2N
none of these

More Laws Of Motion QUESTIONS AND ANSWERS available in next pages

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