Flashcards
P2 Flash cards - motion
Cards in this deck (23)
- 1Unit for acceleration?
- 2Speed =Distance / Time
- 3How do you find speed from a distance-time graph?Gradient of the line
- 4Constant speed on distance-time graph
- 5Gradient of velocity-time graph =ACCELERATION
- 6Area of velocity time graph =DISTANCE TRAVELLED
- 7Constant acceleration on velocity-time graph
- 8Newton's 1st lawEvery object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.
- 9Newton's 2nd lawThe acceleration of an object is produced by a resultant force and is directly proportional to the magnitude of the resultant force, in the same direction as the net force, and inversely proportional to the mass of the object.
F = ma - 10Newton's 3rd lawFor every action, there is an equal and opposite reaction.
- 11work doneforce acting x distance moved in the DIRECTION OF THE FORCE
- 12Hooke's lawThe extension of a material is proportional to the force applied to the object UP TO the ELASTIC limit of the material
- 13Hooke's law formulaF = ke
- 14Hooke's law graphspring constant, k = gradient of STRAIGHT LINE
- 15Kinetic Energy formula
- 16Find velocity using Kinetic Energy
- 17Find mass from Kinetic EnergyDon't forget to SQUARE the VELOCITY
- 18When objects fall......Kinetic Energy gained = GPE lost
- 19GPE =mass x gravitational field strength x height
m x g x h
On earth: g = 10 N / kg - 20Momentum is.....the product of the mass and velocity of an object.
how hard it is to make a moving object change velocity. - 21Momentum formulap = mv
- 22Momentum unitkgm/s
- 23Principle of conservation of momentummomentum before collision/explosion = momentum after
UNLESS objects are acted upon by an EXTERNAL force