Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Test 3 phy science
gravity, momentum and energy
| Question | Answer |
|---|---|
| In the absence of external work input or output, the energy of a system remains unnchanged. Energy cannot be created or destroyed. | Conservation of energy |
| The work output of any machine cannot exceed the work input. In an ideal machine, where no energy is transformed into heat, work input = work output and (Fd)input=(Fd)output | Conservation of energy and machines |
| In the absence of an external force, the momentum of a system remains unchanged. Hense, the momentum before an event involving only internal forces is equal to the momentum after the event: mv(before envent)=mv(after envent) | Conservation of momentum |
| The percentage of the work put into a machine that is converted into useful work output. (It is useful energy output divided by total energy input) | Efficiency |
| A collision in which colliding objects rebound without lasting deformation or the gereration of heat. | Elastic Collision |
| The property of a system that enables it to do work | Energy |
| The product of the force acting on an object and the time during which it acts. | Impulse |
| A collision in which the colliding objects become distorted, gererate heat, and possibly stick together. | Inelastic collision |
| The SI unit of energy and work, equivalent to a newton-meter | Joule |
| Energy of motion, descrived by the relationship... ____________=1/2mv^2 | Kinetic Energy |
| The product of the mass of an object and its velocity | Momentum |
| The stored energy that a body possesses because of its position | Potential energy |
| The time rate of work:__________=work/time (the rate at which energy is expended) | Power |
| Impulse is equal to the change in the momentum of the object upon which the impulse acts. Ft=(triangle)mv | Relationship of impulse and momentum |
| The product of the force and the distance through which the force moves: _____=Fd | Work |
| The work done on an object equals the change in kinetic energy of the object: Work=(triangle)KE | Work-Energy Theorem |
| Any force that is directed at right angles to the path of a moving object and that tends to produce circular motion. | Centripetal force |
| The attractive force between objects due to mass | |
| Law relating the intensity of an effect to the inverse square of the distance from the cause: Intensity~ 1/distance^2 | Inverse-square law |
| Every body in the universe attracts every other body with a mutually attracting force. For two bodies, this force is directly proportional to the product of their masses and inversely proportional to the square of the distamce sep. them | Law of universal gravitation |
| The curved path followed by a projectile near the Earth under the influence of gravity only. | Parabola |
| Any object that moves through the air or through space under the influence of gravity | Projectile |
| Velocity that is parallel to a curved path | Tangential velocity |
| The proportionality constant in Newton's law of gravitation | Universal constant of gravitation, G |
| A condition encountered in free fall wherein a support force is lacking | Weightlessness |
Created by:
kasseynix
Popular Physical Science sets