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Identify the actions involved in the fol...

Identify the actions involved in the following situations as push or pull, or both :
e) a football player taking a penalty corner.

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Which of the following actions involves a push?

Table 11.1 gives some examples of familiar situations involving motion of objects. You can add more such situations or replace those given here. Try to identify action involved in each case as a push and/ or a pull and record your observation. One example has been given to help you.

Rajeev, the owner of Pathways Constructions decided to start a campaign to create awareness among people for developing clean surroundings in their area. He formed a team of 10 members to list the different ways for cleaning the sorroundings. One suggested to tak the help of local residents, another suggested that they may involve school-going children in their venture. One more suggest was to take the help of unemployed youth. On evaluation of different ways, it was decided to take the help of local residents. To achieve the desired goal various activities were identified like: (a) Purchase of necessary items like dustbins, garbage bags, brooms, etc.: (b) Collection of garbage: (c) Disposal of garbage, etc. After identification of different activities the work was allocated to different members. (i) Identify the concepts of management involved in the above situation and quote the lines which help in their identification. (ii) Also identify the values which the company wants to communicate to the society.

Two persons, A of mass 60 kg and B of mass 40 kg , are standing on a horizontal platform of mass 50 kg . The platform is supported on wheels on a horizontal frictionless surface and is initially at rest. Consider the following situations. (i) Both A and B jump from the platform simultaneously and in the same horizontal direction. (ii) A jumps first in a horizontal direction and after a few seconds B also jumps in the same direction. In both the situations above, just after the jump, the person ( A or B ) moves away from the platform with a speed of 3 m//s relative to the platform and along the horizontal. Final speed of the platform in situation (i), i.e., just after both A and B have jumped will be a.

Two persons, A of mass 60 kg and B of mass 40 kg , are standing on a horizontal platform of mass 50 kg . The platform is supported on wheels on a horizontal frictionless surface and is initially at rest. Consider the following situations. (i) Both A and B jump from the platform simultaneously and in the same horizontal direction. (ii) A jumps first in a horizontal direction and after a few seconds B also jumps in the same direction. In both the situations above, just after the jump, the person ( A or B ) moves away from the platform with a speed of 3 m//s relative to the platform and along the horizontal. Final speed of the platform in situation (ii), i.e., just after B has jumped, will be nearly

LAKHMIR SINGH & MANJIT KAUR-FORCE AND PRESSURE.-EXERCISE
  1. Identify the actions involved in the following situations as push or p...

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  2. Identify the actions involved in the following situations as push or p...

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  3. Identify the actions involved in the following situations as push or p...

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  4. Identify the actions involved in the following situations as push or p...

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  5. Name two contact forces.

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  6. Name two non - contact forces.

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  7. When a plastic pen is rubbed in dry hair, it attracts tiny pieces of p...

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  8. A small device pulls iron nails from a distance. Which type of force i...

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  9. Which forces can be used to gather iron pins scattered on the floor ?

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  10. Name the force which always opposes motion.

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  11. Which forces makes a rolling ball stop on its own ?

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  12. An inflated balloon was pressed against a wall after it has been rubbe...

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  13. What name is given to the force acting on a unit area of an object ?

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  14. Name the quantity whose one of the units is pascal (Pa) ?

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  15. What conclusion do you get from the observation that a fountain of wat...

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  16. What type of pressure is involved in the filling of a liquid in a syri...

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  17. What substance present in our body balances the atmospheric pressure a...

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  18. Where will the atmospheric pressure be greater - at ground level or at...

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  19. Name any two devices used in everyday life which work on the existance...

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  20. If a vacuum is created between two Magdeburg hemispheres joined togeth...

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