16. Friction is
17. Friction
18. Force has
19. Burning of a meteor in the atmosphere is due to
20. A stone falling from the roof of a house is an example of
21. A cricketer catches a ball. The force coming in action is
22. A boy is pulling a cart by a force of 100 N. The frictional force experienced by the cart is 20 N. The force that causing the motion of the cart is
23. A box of weight 400 N is kept on the floor. The area of contact is 4 m2. The pressure exerted by the box on the floor is
24. Opening a door is an example of .............
25. What is the cause of change in motion or change in the state of motion?
26. A charged balloon attaches to a wall because of ..........
27. The unit of force is ...............
28. What is force?
29. A body is said to be under balanced forces when the resultant force applied on that body is ........
30. The ratio of force, acting perpendicular to the area, on which it acts is known as ..........
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