 # P2 Flash cards - motion

Flashcards by , created over 4 years ago

## Cards to cover motion part of P2 188 16 0  Created by mblackham over 4 years ago
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 Question Answer Unit for acceleration? 945b2115-51ac-4072-a54e-6cefa93e7018.gif (image/gif) Speed = Distance / Time How do you find speed from a distance-time graph? Gradient of the line Constant speed on distance-time graph e8119750-5edb-47ec-bb9d-2136c3dd9944.gif (image/gif) Gradient of velocity-time graph = ACCELERATION Area of velocity time graph = DISTANCE TRAVELLED Constant acceleration on velocity-time graph 3cc78ee5-8196-4245-b086-a74203df5eaa.gif (image/gif) Newton's 1st law Every object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. Newton's 2nd law The 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 Newton's 3rd law For every action, there is an equal and opposite reaction. work done force acting x distance moved in the DIRECTION OF THE FORCE Hooke's law The extension of a material is proportional to the force applied to the object UP TO the ELASTIC limit of the material Hooke's law formula F = ke Hooke's law graph spring constant, k = gradient of STRAIGHT LINE e086ba45-7481-4f72-87c1-f2725a37e3d9.gif (image/gif) Kinetic Energy formula 13e7378f-94e5-477a-baa9-9a19739559fd.gif (image/gif) Find velocity using Kinetic Energy e00aa226-815f-478f-bed9-26a00c8522aa.jpg (image/jpg) Find mass from Kinetic Energy Don't forget to SQUARE the VELOCITY d4a38c1b-6e37-4185-a59f-d5eafed9618b.jpg (image/jpg) When objects fall...... Kinetic Energy gained = GPE lost GPE = mass x gravitational field strength x height m x g x h On earth: g = 10 N / kg Momentum is..... the product of the mass and velocity of an object. how hard it is to make a moving object change velocity. Momentum formula p = mv Momentum unit kgm/s Principle of conservation of momentum momentum before collision/explosion = momentum after UNLESS objects are acted upon by an EXTERNAL force