Dynamics-II

1. A car drives at a steady speed around a perfectly circular track.

 
 
 
 

2. The correct order of comparison for the terminal speeds of a raindrop, snowflakes, and hailstones is:

 
 
 
 

3. A seesaw balances perfectly with two children of equal weight sitting at equal distances from the fulcrum. If one child moves closer to the fulcrum:

 
 
 
 

4. It is more difficult to walk on a slippery surface than on a nonslippery one because of:

 
 
 
 

5. If a body is at rest or moving with uniform rotational velocity, then the torque acting on the body will be:

 
 
 
 

6. A body in equilibrium must not have:

 
 
 
 

7. A satellite of mass ‘m’ is revolving around the earth with an orbital speed V. If the mass of the satellite is doubled, its orbital speed will become:

 
 
 
 

8. A uniformly rotating fan is said to be in:

 
 
 
 

9. The force that always changes the direction of velocity and not its magnitude is called:

 
 
 
 

10. For an object moving with terminal velocity, its acceleration:

 
 
 
 

11. A tightrope walker is carrying a long pole while walking across a rope. The stability of the walker is affected if the pole is:

 
 
 
 

12. You throw a weighted fishing net into a calm lake. As the net sinks, it opens fully underwater, spreading out its mesh evenly. Compared to the moment it left your hand, where is the net’s center of mass now?

 
 
 
 

13. You are trying to loosen a nut using a spanner, but it is not working. To open the nut, you need to:

 
 
 
 

14. The reason that a car moving on a horizontal road gets thrown out of the road while taking a turn is:

 
 
 
 

15. When the line of action of the applied force passes through its pivot point then a moment of force acting on the body is:

 
 
 
 

Question 1 of 15

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  3. Work and Energy
  4. Density and Temperature
  5. Magnetism
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  7. Q.8 How measuring cylinder is used to measure the volume of an irregularly shaped stone?
  8. Q.9 What precautions should be kept in mind while taking measurements using a measuring cylinder?
  9. Q.10 Why do we need to consider significant digits in measurements?
  10. Q11. How random error can be reduced?
  11. Q12. Differentiate between precision and accuracy.
  12. Q.1 Define Physics. Describe its revolutionary role in technology.
  13. Q2. List with brief descriptions of different branches of physics.
  14. Q1. Write the following numbers in scientific notations.
  15. Q2. Express the followings measurements using prefixes.
  16. Q3. If a boy has age of 15 years 2 months and 10 days, convert his age in a. seconds b. milliseconds c. mega seconds
  17. Q4. How many kilometers are there in 25 micrometers?
  18. Q5. What is pitch and least count of: a. Vernier calipers if the smallest division on the main scale is 1 mm and total divisions on the vernier scale are 20. b. Screw gauge if the smallest division on its main scale is 0.5 mm and its movable scale has 50 divisions.
  19. Q6. Look at the measurement of vernier calipers:
  20. Q7. Look at the figure of screw gauge, let a small steel ball is place between its thimble and anvil then: