Flashcards
Science Exam: Physics
Flashcards do conjunto (25)
- 1Speed-Formula: D/T:
-Distance over time
-The measure of how fast an object is moving - 2Velocity- Formula: v=d/t
- Velocity = distance over time
- a description of both speed and direction
- Unit=m/s - 3Acceleration-Formula: A=Vfinal-Vinitial/Time
- Vfinal-Vinitial over time
- measures how much an object's velocity changes over time - 4Vectordirection
- 5Scalarno direction needed
- 6Distancehow far an object moves in total
- 7Displacementthe distance an object moves from a starting position
- 8Friction Types-rolling
-sliding
-fluid/air
-static - 9RollingExample: bowling
- 10SlidingExample: Ice Skating
- 11Fluid/AirExample: air or water resistance
- 12Staticinitial friction when moving an object
- 13Forcesbalanced vs. unbalanced
- 14Balanced ForceTwo forces acting in opposite directions on an object
- 15Unbalanced Forcegravity or air/fluid friction
- 16Actionsomething that occurs
- 17ReactionThe result of an action or what happens because of the action
- 18Newton's Lawsthere are three of them
- 19Newton'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 - 20Newton's 2nd Lawthe acceleration of an object depends on the force acting on the object and the object's mass
- 21Newton's 3rd LawFor every action, there is an equal and opposite reaction
- 22Kinetic Energy- Formula: KE=1/2m X v^2
-energy in motion/being used to create an action of some kind
- measured in Joules - 23Potential EnergyFormula: 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 - 24MomentumFormula: P=mv
M=Mass
V=Velocity
-depends on objects mass and velocity
- Newton called it the "Quantity of motion" - 25Conservation 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