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Newton's Laws of Motion and Momentum - Coggle Diagram
Newton's Laws of Motion and Momentum
Laws of Motion
First
- An Object will remain at rest or continue to move at a constant velocity unless acted upon by a resultant force.
Third
- When two objects interact, they exert equal and opposite forces to each other.
All interactions can be explained in terms of four fundamental forces: gravitational, electromagnetic, weak nuclear and strong nuclear.
Second
- the resultant force acting on an object is directly proportional to the rate of change of momentum.
Momentum
When two objects collide, the total momentum in the system is conserved.
The principle of conservation of momentum
- for a system of interacting objects, the total momentum in a specific direction remains constant, as long as no external forces act on the system.
There are two types of collision,
elastic
and
inelastic
elastic
- the total kinetic energy in the system is conserved
inelastic
- the total kinetic energy in a collision is not conserved
Momentum is conserved in a collision because the net force acting on the two objects is zero, therefore according to Newton's second law the change of momentum of both objects must be zero.
Impulse
The impulse of a force is defined as the product of force and the time for which the force acts on an object
The product of force and time is equal to the change in momentum.
The area under a force-time graph is equal to the impulse of the force
Resolving Momentum
The momentum in any direction must be conserved, this means the momentum in both the x and y direction individually must remain the same.
When resolving momentum, you can calculate how each direction would resolve independently of any other directions.