please solve them. Answers to be written in copy with proper marking of the question number. all the answers should be written. people who don't know the answers will not answer.
Answers
Answer:
1)A force is a push or pull upon an object resulting from the object's interaction with another object.
Explanation:
2)A contact force is any force that requires contact to occur. Contact forces are ubiquitous and are responsible for most visible interactions between macroscopic collections of matter. Pushing a car up a hill or kicking a ball across a room are some of the everyday examples where contact forces are at work.
A non-contact force is a force which acts on an object without coming physically in contact with it.[1] The most familiar non-contact force is gravity, which confers weight.[2] In contrast a contact force is a force applied to a body by another body that is in contact with it.[2]
3)We sprinkle powder on carrom board to make the surface of the board smooth. This reduces the friction between the surface of the carrom board, the striker and the coins. As a result, the coins and the striker can move easily on the carrom board.
4)While catching a fast moving cricket ball, a fielder in the ground gradually pulls his hand backward with the moving ball, In doing so, the fielder increases the time during which the high velocity of the moving ball decrease to zero. Thus, the acceleration of the ball is decreased and therefore the impact of catching the fast moving ball is also reduced.
If the ball stopped suddenly then its high velocity is decreased to zero in a very short interval of time.
Thus, the rate of change of momentum of the ball will be large. Therefore, a large force would have to be applied for holding the catch that may hurt the palm of the fielder.
Answer:
1). A force is a push or pull upon an object resulting from the object's interaction with another object.
2). A non-contact force is a force which acts on an object without coming physically in contact with it. ... In contrast a contact force is a force applied to a body by another body that is in contact with it.
3). To decrease the friction.
4). While catching a fast moving cricket ball , a fielder in the ground gradually pulls his hand backwards with the moving ball, In doing so, the fielder increases the time during which the high velocity of the moving ball decrease to zero.