1735949
Beschreibung
Quiz von Nicole Saville, aktualisiert more than 1 year ago
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Erstellt von Nicole Saville
vor fast 10 Jahre
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Frage 1
Frage
What is internal energy?
Antworten
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when an object has speed
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the movement of particles
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the random movement of molecules and the attractive forces between them when they're together
Frage 2
Frage
What is chemical energy
Antworten
-
energy can be released when the arrangement of atoms is altered
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energy can be released by reorganising the protons and neutrons in an atoms nucleus
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where an object is at a high level in the earth's gravitational field
Frage 3
Frage
What is energy?
Antworten
-
the ability to do work
-
the work done by a force
-
work done per unit time
Frage 4
Frage
Which of these are examples of potential energy?
Antworten
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chemical
-
electrical potential
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electromagnetic
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gravitational potential
-
nuclear
-
internal
-
sound
-
kinetic
Frage 5
Frage
What is a kinetic type of energy?
Antworten
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where movement is taking place
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regions where electric, magnetic, gravitational or nuclear forces exist
Frage 6
Frage
The conservation of energy is: In a closed system, energy may be converted form one form into another but never created or destroyed
Antworten
- True
- False
Frage 7
Frage
What is the equation for kinetic energy?
Antworten
-
1/2mv^2
-
mgh
-
mgv
-
1/2mv
Frage 8
Frage
What is energy measured in?
Antworten
-
Joules
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Newtons/metre
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Joule metre/second
Frage 9
Frage
What is work done?
Antworten
-
focre / distance
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force x distance moved in the direction of force
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force x energy
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energy x distance
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force / time
Frage 10
Frage
Work done is the energy transferred when a force is mode through a distance
Antworten
- True
- False
Frage 11
Frage
What is power and what is it measured in?
Antworten
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work done/ time taken
-
watts
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joules
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work done x time
Frage 12
Frage
One watt is the power generated when one joule of energy is transferred to an object.
Antworten
- True
- False
Frage 13
Frage
What is weight?
Antworten
-
The gravitational force on an object
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mass x gravity
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the mass of an object
Frage 14
Frage
What is terminal velocity?
Antworten
-
the velocity at which an objects drag equals its acceleration force
-
for free fall - when weight = drag
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the fastest possible velocity
-
when you're accelerating
Frage 15
Frage
At terminal velocity:
Antworten
-
kinetic energy is constant
-
the GPE is transferred to the surrounding air as heat
-
The loss in KE is the work done by the drag force
Frage 16
Frage
The 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.
Antworten
- True
- False
Frage 17
Frage
The larger the mass, the smaller the terminal velocity
Antworten
- True
- False
Frage 18
Frage
What is stopping distance?
Antworten
-
The time taken for a car to stop
-
The total instance a car travels from the moment the driver sees a hazard
-
The time taken from the moment the driver has pressed the break
Frage 19
Frage
Factors that increase thinking distance:
Antworten
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under the influence of alcohol or other drugs
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tiredness
-
distractions
-
high speed
-
weather
-
intelligence
Frage 20
Frage
The work done to stop an object will be equal to the change in kinetic energy of the object
Antworten
- True
- False
Frage 21
Frage
Factors that increase breaking distance
Antworten
-
high speed
-
mass of vehicle
-
road conditions
-
car conditions
-
driver distractions
-
alcohol/drugs
-
tiredness
Frage 22
Frage
If speed of a car doubles:
Antworten
-
kinetic energy quadruples
-
work done quadruples
-
breaking distance quadruples
Frage 23
Frage
An 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.
Antworten
- True
- False
Frage 24
Frage
What is trilateration?
Antworten
-
using four satellites together to determine the position of something
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The distance from a satellite to the earth
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The orbit of a satellite
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