Science Exam: Physics

Sarah Eberle
Flashcards by Sarah Eberle, updated more than 1 year ago
Sarah Eberle
Created by Sarah Eberle over 3 years ago
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Study Set: Physics
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Question Answer
Speed -Formula: D/T: -Distance over time -The measure of how fast an object is moving
Velocity - Formula: v=d/t - Velocity = distance over time - a description of both speed and direction - Unit=m/s
Acceleration -Formula: A=Vfinal-Vinitial/Time - Vfinal-Vinitial over time - measures how much an object's velocity changes over time
Vector direction
Scalar no direction needed
Distance how far an object moves in total
Displacement the distance an object moves from a starting position
Friction Types -rolling -sliding -fluid/air -static
Rolling Example: bowling
Sliding Example: Ice Skating
Fluid/Air Example: air or water resistance
Static initial friction when moving an object
Forces balanced vs. unbalanced
Balanced Force Two forces acting in opposite directions on an object
Unbalanced Force gravity or air/fluid friction
Action something that occurs
Reaction The result of an action or what happens because of the action
Newton's Laws there are three of them
Newton's 1st Law "An object in motion stays in motion, an object at rest stays at rest with the same speed and velocity unless acted upon by an unbalanced force(Gravity)" - inertia is the tendency of an object to resist change in its velocity: whether in motion or motionless
Newton's 2nd Law the acceleration of an object depends on the force acting on the object and the object's mass
Newton's 3rd Law For every action, there is an equal and opposite reaction
Kinetic Energy - Formula: KE=1/2m X v^2 -energy in motion/being used to create an action of some kind - measured in Joules
Potential Energy Formula: PE=mgh M= Mass G=acceleration of gravity(M/s^2) H= Height - Energy that is not being used - stored energy -the higher something is from Earth's surface the more potential energy it has
Momentum Formula: P=mv M=Mass V=Velocity -depends on objects mass and velocity - Newton called it the "Quantity of motion"
Conservation of Momentum -states that any time objects collide, the amount of momentum stays the same, but can be transferred between the objects - conservation means that thing is not changing - So in the "Conservation of Momentum", the momentum is not changing it is constant
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