Test
Energy, work, power
Crea una cuenta gratis para terminar este test
Guarda tu progreso y consulta tu resultado final.
¿Ya tienes cuenta? Inicia sesión
Preguntas del test (24)
1What is internal energy?
- Awhen an object has speed
- Bthe movement of particles
- Cthe random movement of molecules and the attractive forces between them when they're together
- Awhen an object has speed
2What is chemical energy
- Aenergy can be released when the arrangement of atoms is altered
- Benergy can be released by reorganising the protons and neutrons in an atoms nucleus
- Cwhere an object is at a high level in the earth's gravitational field
3What is energy?
- Athe ability to do work
- Bthe work done by a force
- Cwork done per unit time
4Which of these are examples of potential energy?
- Achemical
- Belectrical potential
- Celectromagnetic
- Dgravitational potential
- Enuclear
- Finternal
- Gsound
- Hkinetic
5What is a kinetic type of energy?
- Awhere movement is taking place
- Bregions where electric, magnetic, gravitational or nuclear forces exist
6The conservation of energy is: In a closed system, energy may be converted form one form into another but never created or destroyed
- AVerdadero
- BFalso
7What is the equation for kinetic energy?
- A1/2mv^2
- Bmgh
- Cmgv
- D1/2mv
8What is energy measured in?
- AJoules
- BNewtons/metre
- CJoule metre/second
9What is work done?
- Afocre / distance
- Bforce x distance moved in the direction of force
- Cforce x energy
- Denergy x distance
- Eforce / time
10Work done is the energy transferred when a force is mode through a distance
- AVerdadero
- BFalso
11What is power and what is it measured in?
- Awork done/ time taken
- Bwatts
- Cjoules
- Dwork done x time
12One watt is the power generated when one joule of energy is transferred to an object.
- AVerdadero
- BFalso
13What is weight?
- AThe gravitational force on an object
- Bmass x gravity
- Cthe mass of an object
14What is terminal velocity?
- Athe velocity at which an objects drag equals its acceleration force
- Bfor free fall - when weight = drag
- Cthe fastest possible velocity
- Dwhen you're accelerating
15At terminal velocity:
- Akinetic energy is constant
- Bthe GPE is transferred to the surrounding air as heat
- CThe loss in KE is the work done by the drag force
16The larger the surface area of an object, the smaller the terminal velocity because there is more drag so you don't accelerate as much before drag = weight.
- AVerdadero
- BFalso
17The larger the mass, the smaller the terminal velocity
- AVerdadero
- BFalso
18What is stopping distance?
- AThe time taken for a car to stop
- BThe total instance a car travels from the moment the driver sees a hazard
- CThe time taken from the moment the driver has pressed the break
19Factors that increase thinking distance:
- Aunder the influence of alcohol or other drugs
- Btiredness
- Cdistractions
- Dhigh speed
- Eweather
- Fintelligence
20The work done to stop an object will be equal to the change in kinetic energy of the object
- AVerdadero
- BFalso
21Factors that increase breaking distance
- Ahigh speed
- Bmass of vehicle
- Croad conditions
- Dcar conditions
- Edriver distractions
- Falcohol/drugs
- Gtiredness
22If speed of a car doubles:
- Akinetic energy quadruples
- Bwork done quadruples
- Cbreaking distance quadruples
23An air bag works by:
deflated nylon bag attached to a crash sensor which measures acceleration and detects when you are breaking very sharply. It releases two chemicals which react rapidly and produce nitrogen gas which inflates the airbag.- AVerdadero
- BFalso
24What is trilateration?
- Ausing four satellites together to determine the position of something
- BThe distance from a satellite to the earth
- CThe orbit of a satellite
Información
- Descripción
- Test sobre Energy, work, power, creado por Nicole Saville el 01/12/2014.
- Autor
- Nicole Saville
- Idioma
- English
- Visitas
- 67
- Historial
- Creado el 1 dic 2014 · actualizado el 11 jun 2016
- Etiquetas
- Valoración
- Aún sin valoraciones Valora este test