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                                                                     FORCE & PRESSURE                                                                                   CLASS 8     Hints to answer the give reason type questions based on pressure class 8 Pressure in solids Check whether the area of contact is increasing or decreasing in given situation Write; Pressure is inversely proportional to area Write Increase or decrease in pressure according to the given area. Conclusion Pressure in liquids Identify the property that matches with the given statement. Check whether the pressure = force/area formula can be used. Conclusion Pressure in gases Check in the statement, whether the surrounding is at low air pressure or the object. Write, Air flows from high pressure to low pressure Write the correct flow of air taking place Conclusion

PRACTICE WORKSHEET (CLASS - VIII) TOPIC – FORCE AND PRESSURE 1. When a force acts on a moving object, it can make the object a) move faster b) slow down c) stop d) all of these 2. Name the type of forces involved in the following :  a) A horse pulling a cart _________________________  b) A moving boat coming to rest when rowing is stopped ___________________ c) A coin falling to the ground on slipping from hand ______________________  d) A sticker attached to steel almirah without glue _________________________ 3. Two students fought over a lunch box, both started pulling it from opposite ends but the box didn't move from its place. What will you infer about the magnitude and direction of the forces? 4. An archer shoots an arrow in the air horizontally. However, after moving some distance, the arrow falls to the ground. Name the initial force that sets the arrow in motion. Explain why the arrow ultimately falls down. Assertion / Reason :  For question numbers 5, two sta