Please give the answer for 3rd question
Dear student,
Force is said to change the state of an object.
But at times even when force is being applied, no state change occurs as the body is experiencing another equal and opposite force.
For example,
1. When we push a wall, force is being applied but the wall does not move.
2. When an object is kept on the floor or on a table, it stays there although a gravitational force is acting on the table vertically downwards due to the weight of the body. This is because of the normal reaction offered by the table to the ball vertically upwards.
Regards
Force is said to change the state of an object.
But at times even when force is being applied, no state change occurs as the body is experiencing another equal and opposite force.
For example,
1. When we push a wall, force is being applied but the wall does not move.
2. When an object is kept on the floor or on a table, it stays there although a gravitational force is acting on the table vertically downwards due to the weight of the body. This is because of the normal reaction offered by the table to the ball vertically upwards.
Regards