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Physics SemesterExam
semester A examination
| Question | Answer |
|---|---|
| acceleration | the rate at which velocity is changing. (includes direction) |
| acceleration equation | a= change in V / change in T |
| air resistance | diminishes net forces acting on an object. |
| elastic collision | when objects come together and bounce off of each other |
| inelastic collistion | when to objects interact and stay attached to each other after the collision. |
| component | the projection of a vector quantity, as force or velocity, along an axis. |
| constant | |
| dependent variable | the part of data that can be changed in an experiment |
| direction | the place where an object is going. |
| displacement | includes direction the change in position of an object |
| the equation for displacement | x final -x intial |
| distance | the space between two places or object. |
| units for distance | meters (m) |
| duration | how long something lasts |
| elliptical | referring to an oval shaped curve that is the path of a point that moves such that the sum of its distances from two fixed points is contant |
| energy | the property of an object of system that enables to do work |
| unit for evergy | Joules (J) |
| force | an influence that accelerates an object using a push or a pull, also a vector quantity |
| units for force | Newtons (N) |
| free fall | motion under the influence of the gravitational force only |
| friction | the force that acts to resists the relative motion (or attempted motion) of objects or materials that are in contact |
| gravitational field force | a force field that exists in the space around every mass or group of masses. |
| horizontally | left to right, right to left |
| hypothesis | an educated guess before an experiemt |
| impluse | product of force and time interval during which the force acts. |
| momentum change equals | impluse * |
| independent variable | the part of an equation that cannot change ex:percentages |
| initial | first, starting |
| investigation | searching for an answer |
| joules | the unit for work and all forms of energy |
| kilogram | unit of mass (kg) |
| kinetic | something in motion |
| kinetic energy | energy in motion |
| equation for kinetic energy | 1/2mass(speed^2) |
| law of conservation of momentum | in the absence of a net force, the momentum of an obeject of system is unchanged. |
| magnitude | a measurement without direction(how big,long,ect.) |
| mass | a measurement of ones inertia and how much matter an object has. |
| momenta | plural of momentum |
| momentum | the product of mass and velocity of an object has magnintude and direction (vector quantity) |
| net force | the combination of all forces action on an object |
| net impulse | |
| newtons is used for | unit for force |
| normal force | for an object resting on a horizontal surface, the upward force that balances the weight of an object. (aka supporting force) |
| potential energy | energy the has the potential to create kenetic energy. ex: rollercoaster at top of hill |
| equation for potential energy | mass(gravity)height |
| projectile | any object that moves through the air or space, acted only by gravity, can be air resistance |
| power | rate at which work is done or energy is transformed. |
| equation for power | P= Work/time |
| radius | from the center of a circle to the outside |
| resistance | going against |
| scientific notation | a number times 10 to the power of something (negative= decimal, positive=positive) ex: 2.4 x 10^4 = 24,000 |
| static | |
| vectors | an arrow whose length represents the magnitude of a quantity and whose direction represents the direction of the quantity |
| velocity | speed together with the direction of motion |
| vertically | up and down |
| volume | space that occupies an object. |
| weight | the force on a body due to gravity |
| work | the product of the force on an object and the distance through which the object is moved. |
| work is measure in Joules | W= Force (distance) |
| Y intercept | the place on a graph where x=0 |
| newtons 1st law | a force will remain constant unless acted upon an outside force |
| newtons second law | F=ma law |
| newtons 3rd law | each force has an equal an opposite force |
Created by:
Ylimeli
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