Sir/Mam following is my question :
When a force acting on a body has equal and opposite reaction, then why should the body move at all?
Pls help me solve this question.
Thnx
Sir/Mam following is my question :
When a force acting on a body has equal and opposite reaction, then why should the body move at all?
Pls help me solve this question.
Thnx
For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. If body A exerts a force F on body B, then body B exerts an equal and opposite force −F back on body A. The mathematical expression for this is FAB = −FBA
The subscript AB indicates that A exerts a force on B, and BA indicates that B exerts a force on A. The minus sign indicates that the forces are in opposite directions. Often FABand FBA are referred to as the action force and the reaction force; however, the choice of which is which is completely arbitrary.
If one object is much, much more massive than the other, particularly in the case of the first object being anchored to the Earth, virtually all of the acceleration is imparted to the second object, and the acceleration of the first object can be safely ignored. For instance, if you were to plant your feet and throw a baseball to the west, you would not have to consider that you actually caused the rotation of the Earth to speed up slightly while the ball was in the air. However, if you were standing on roller skates, and you threw a bowling ball forward, you would start moving backward at a noticeable speed.
"Newton's third Law in action"
Rockets traveling through space encompass all three of Newton's laws of motion.
When the engines fire and propel the rocket forward, it is the result of a reaction. The engine burns fuel, which is accelerated toward the rear of the ship. This causes a force in the opposite direction to push the rocket forward. Thrusters can also be used on the sides of the rocket to make it change direction, or on the front to create a backwards force to slow the rocket down.
And if, while working on the outside of the rocket, the astronaut's rope breaks and they drift away from the rocket, they can use one of their tools, for example, to change directions and get back to the rocket. The astronaut can throw their hammer in the direction directly opposite of where they want to go. The hammer will go flying off very quickly away from the rocket and the astronaut will very slowly travel back to the rocket. This is why Newton's Third Law is considered to be the fundamental principle of rocket science.
If body A exerts a force F on body B, then body B exerts an equal and opposite force −F back on body A. The mathematical expression for this is FAB = −FBA
The subscript AB indicates that A exerts a force on B, and BA indicates that B exerts a force on A. The minus sign indicates that the forces are in opposite directions. Often FABand FBA are referred to as the action force and the reaction force; however, the choice of which is which is completely arbitrary.
If one object is much, much more massive than the other, particularly in the case of the first object being anchored to the Earth, virtually all of the acceleration is imparted to the second object, and the acceleration of the first object can be safely ignored. For instance, if you were to plant your feet and throw a baseball to the west, you would not have to consider that you actually caused the rotation of the Earth to speed up slightly while the ball was in the air. However, if you were standing on roller skates, and you threw a bowling ball forward, you would start moving backward at a noticeable speed.
"Newton's third Law in action"
Rockets traveling through space encompass all three of Newton's laws of motion.
When the engines fire and propel the rocket forward, it is the result of a reaction. The engine burns fuel, which is accelerated toward the rear of the ship. This causes a force in the opposite direction to push the rocket forward. Thrusters can also be used on the sides of the rocket to make it change direction, or on the front to create a backwards force to slow the rocket down.
And if, while working on the outside of the rocket, the astronaut's rope breaks and they drift away from the rocket, they can use one of their tools, for example, to change directions and get back to the rocket. The astronaut can throw their hammer in the direction directly opposite of where they want to go. The hammer will go flying off very quickly away from the rocket and the astronaut will very slowly travel back to the rocket. This is why Newton's Third Law is considered to be the fundamental principle of rocket science.
