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Force And Pressure

Question
CBSEENSC8005512

Give two examples each of situations in which you push or pull to change the state of motion of objects.

Solution

Objects are pushed or pulled inorder to change it's state of motion.

Examples of push are:
1) We push a door to open it.
2) A football player kicks the ball and pushes it. 

Examples of pull are:
1) We pull the desk to change its position.
2) The rope is pulled, to draw a bucket of water from a well.

Some More Questions From Force And Pressure Chapter

To draw water from a well,we have to ____________ the rope.

A charged body ____________ an uncharged body towards it.

To move a loaded trolley we have to ____________ it.

The north pole of a magnet ____________ the north pole of another magnet.

An archer stretches her bow while taking aim at the target. She then releases the arrow, which begins to move towards the target. Based on this information fill up the gaps in the following statements using the following terms :


Muscular, contact, non-contact, gravity, friction, shape, attraction

i) To stretch the bow, the archer applies a force that causes a change in its ____________ .

An archer stretches her bow while taking aim at the target. She then releases the arrow, which begins to move towards the target. Based on this information fill up the gaps in the following statements using the following terms :

Muscular, contact, non-contact, gravity, friction, shape, attraction

ii) The force applied by the archer to stretch the bow is an example of ____________ force.

An archer stretches her bow while taking aim at the target. She then releases the arrow, which begins to move towards the target. Based on this information fill up the gaps in the following statements using the following terms :

Muscular, contact, non-contact, gravity, friction, shape, attraction

iii) The type of force responsible for a change in the state of motion of the arrow is an example of a ____________ force.

An archer stretches her bow while taking aim at the target. She then releases the arrow, which begins to move towards the target. Based on this information fill up the gaps in the following statements using the following terms :

Muscular, contact, non-contact, gravity, friction, shape, attraction

(iv) While the arrow moves towards its target, the forces acting on it are due to ____________ and that due to ____________ of air.

In the following situation identify the agent exerting a force and the object on which it acts. State the effect of the force in such case.

Squeezing a piece of lemon between the fingers to extract its juice.

In the following situation identify the agent exerting a force and the object on which it acts. State the effect of the force in such case.

Taking out paste from a toothpaste tube.