And if you consider the entire car-earth system?Mohammed Shoaib said:Momentum is conserved when no external force acts on the system. When the car comes to normal stop, the external force from the road or from the brake acts on the car to stop. Hence, the conservation of principle is not valid in this process. Am I right.
Yes, it should be. Yet the car momentum after is zero and the one before non zero.Mohammed Shoaib said:Then momentum is conserved. Is it not?
Thanks for your kind help.Orodruin said:Yes, it should be. Yet the car momentum after is zero and the one before non zero.
This is a conundrum for many people who are just learning conservation of momentum.
Conservation of momentum is a fundamental law of physics that states that the total momentum of a closed system remains constant over time, regardless of any internal changes or external forces acting on the system.
Conservation of momentum is important because it allows us to accurately predict the motion of objects in a closed system. It is also a key principle in understanding and solving real-world problems, such as collisions and explosions.
Conservation of momentum is applied by using the principle of the conservation of momentum equation, which states that the total momentum before an event or interaction is equal to the total momentum after the event or interaction. This can be used to determine the velocities and directions of objects involved in a collision or explosion.
Yes, conservation of momentum is always valid in closed systems where there are no external forces acting on the system. In open systems, where external forces may be present, the law can still be applied by taking into account the change in momentum due to these external forces.
Some real-world examples of conservation of momentum include billiards, where the momentum of the cue ball is transferred to the other balls in a collision, and rocket propulsion, where the momentum of the exhaust gas propels the rocket forward. Another example is a car crash, where the total momentum before the crash is equal to the total momentum after the crash, despite the change in velocity and direction of the cars involved.