Force & Pressure

Force and pressure Worksheet-10

1. Define the term atmospheric pressure.

2. How would 'thrust' on the bottom of a liquid level change if 'area' is doubled keeping the 'pressure' same?

3. Two objects of masses M and 2M are lying on an equal area. Determine the ratio of pressure exerted by them on the ground.

4. When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in. the dropper. The rise of water in the dropper is due to

(a) Pressure of water.

(b) Gravity of the earth.

Force and pressure Worksheet-11

21. Is the force of gravity a contact force or non-contact force?

22. Which force is responsible for the weight of objects?

23. Does the force of gravitation exist between two objects on the earth?

24. Define pressure.

25. Do the gases and liquids exert pressure on the walls of the container?

26. Define atmosphere.

Force and pressure Worksheet-12

41. Why does a boat come to rest when we stop rowing it?

42. What type of force exists between a magnet and iron piece and between two magnets?

43. What is meant by electrostatic force? Is it a contact force or a non-contact force?

44. Define pressure and give its SI unit.

45. Do we feel the effect of atmospheric pressure? Why?

46. Define Pressure. Write the relation between pressure force and area. Name the instrument used to measure atmospheric pressure.