Dynamics Flashcards
Newton’s first law of motion
Newton’s first law of motion states that an object remains at rest or continue to move with a constant velocity unless an external resultant force acts on it. It is also known as the law of inertia.
Define Mass
The property of an object to resist change in motion
Define Weight and instrument used to measure
The force experienced by a mass in a gravitational field. Measured by weighing scale.
Define Apparent weight and instrument used to measure
Refers to the reading showed showed on a measuring instrument. Measured by spring balance.
Newton’s third law of motion
Newton’s third law states that the forces of action and reaction between interacting objects are equal in magnitude but opposite in direction, of the same type and act on different bodies. (size of object does not matter)
Newton’s second law of motion
Newton’s second law of motion states that the rate of change of momentum of an object is directly proportional to the resultant force acting on it and occurs in the same direction of the resultant force.
Define Impulse
It is the product of force and time of impact. It is the change in momentum.
Define Principles of Conservation of linear momentum
Principles of Conservation of momentum states that the total momentum of a system of interacting objects remain constant provided no external resultant force acts on the system.
Define Perfectly inelastic collision
Perfectly inelastic collision is a special case of inelastic collision whereby two objects collide, stick together and then move on together with the same velocity after the collision.
Define Inelastic collision
Inelastic collision is a collision in which the total momentum in a collision is conserved while the total kinetic energy is not conserved.
Define elastic collision
Elastic collision occurs when both total kinetic energy and total momentum is conserved in a collision.
