Force & Friction

4. the frictional force exerted by fluids on objects moving through them is called ________.
5. the resistive force acting between the two bodies that are in contact and in motion such that it opposes the motion is called ________.
6. a force can change the ________ of a body.
7. all gasses and liquids are collectively called________.
8. A force acting between the two bodies that require a physical contact between them is called a________force
11. a negative charge and a positive charge will _________ each other.
13. force can increase the ________ of a moving body.
16. the maximum value of static friction just before a body starts to move is called _________ friction.
17. _______ is the force that is the result of the action of muscles.
20. the force exerted between two magnets or between a magnet and a magnetic material such as iron is called _________ force.
25. friction caused due to air can be reduced by making the object in desired ___________ shape.
26. the force acting between charged particles is called _________force.
27. the friction force acting between the surfaces when an object ________ over a surface is called rolling friction.
28. Trekking shoes have _______ to give a strong grip.
29. sprinkling a little talcum powder on the carom board helps to _______ the friction.
30. _________is either a push or a pull.

1. the force of attraction that pulls object towards the surface of the Earth is called ________force.
2. A force acting between the two bodies that does not require a physical contact between them is called a________force
3. _________ Chargers attract each other.
6. the friction will be less when the two surfaces are________.
9. the frictional force acting between two surfaces when there is a relative motion between them is called _______ friction.
10. the _________ on the surfaces in contact is the cause of friction between them.
12. the materials used to reduce friction are called _________.
14. the friction acting between two surfaces in contact when there is no _________ motion between them is called static friction.
15. a force can change the _________ of a moving body.
18. The friction acting between the surfaces when an object slides over a surface is called ________ friction.
19. A force can make a __________ body move.
21. Tyres of vehicles are _______ to provides sufficient friction between the tires and the roads on which they run.
22. the force of limiting friction is independent of the ________ of contact between the two surfaces.
23. The rolling friction is ________ than sliding friction.
24. Two similar _______ of two different magnets repel each other.
27. like charges _________ each other.