Newtonian World Flashcards
Newton’s 1st law
An object will remain at rest or continue to travel at constant velocity unless acted on by an external force
Newton’s 2nd law
The resultant force on an object is directly proportional to and in the same direction as its rate of change of linear momentum
Newton’s 3rd law
If a body A acts on a body B with a force F then the body B acts on the body A with a force that is equal in magnitude but opposite in direction to F
Newton’s Law of gravitation
Force is proportional to the product of the masses and inversely proportional to the square of their separation
Linear momentum
Mass x velocity (vector quantity)
Impulse of a force
The product of a force and the time for which it acts
Impulse (not definition)
equal to change in momentum, and is the area under a force-time graph
Perfectly elastic collision
A collision in which no kinetic energy is lost.
Inelastic collision
A collision in which kinetic energy is lost / not conserved.
Radian
The angle that subtends an arc equal in length to the radius of the circle
Centripetal acceleration
The acceleration towards the centre of a circle
Centripetal force
The resultant force on an object travelling in a circle (which is directed towards the centre of the circle)
Gravitational field strength
Force (of attraction) per unit mass (in a gravitational field)
Period (circular motion)
The time to make one complete revolution
Geostationary orbit
The orbit of an artificial satellite with a period of 1 day which always remains above the same point on the Earth’s equator
