Hello dear students we have learnt that, when there is change in momentum of body, force associated with it also changes. “Rate of change of momentum is directly proportional to the impressed force, and the change in momentum is takes towards the direction of applied force.”
When you applied force, it strikes on wall it bounces towards you, projection of satellite are some important applications of third law of motion.
Let’s learn the Newton’s third law of motion in detail……!
According to Newtonian mechanics the mutual forces between two bodies are always equal and opposite.
Statement: For every action force, there is equal, opposite and instantaneous reaction force.
During the reaction, the direction of velocity of object is always gets reversed so as to reverse the direction of force too.
Let’s illustrate this with simple example…..!
Consider a satellite is at rest on the earth before launching. For launching after ignition the fuel will burn and will exert large thrust on the earth’s surface.
This helps satellite to gain enough kinetic energy required for its initial launching process. This is nothing but the Newton’s third of motion.
Importance of Newton’s third law……..!
- It defines action and reaction as equal and opposite forces acting along the same line.
- Action and reaction forces are always on different objects.