Summary: Physics
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Read the summary and the most important questions on Physics
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1 Energy
This is a preview. There are 12 more flashcards available for chapter 1
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What are the 9 types of energy?
Thermal
Radiation
Sound
Kinetic
Electrical
Nuclear
Elastic
Gravitational
Chemical -
Kinetic Energy Formula
KE 1/2 mass x velocity2 -
Work done and power formulas
Wd= force x distance in the direction of force
power = wd/ t -
Hydro electric power
HEP uses kinetic energy of moving water from behind a high dam. The GPE turns to kinetic which drives a generator to produce electricity. Energy needed to pump water up hill
Renewable, inexpensive, somewhere high and body of water, reliable quick start up time, efficient. -
Geo thermal energy
Renewable, inexpensive, only in geothermal rivers, very efficientHot water and steam from underground can be used to drive turbines to generate electricity. -
2 Forces
This is a preview. There are 27 more flashcards available for chapter 2
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What is meant by a vector quantity?
A physical quantity with magnitude and direction e.g. velocity, acceleration, force, momentum, displacement, weight, gravitational field strength. -
What is meant by a scalar quantity?
scalar quantities have magnitude but no direction e.g. speed, distance, time, mass, energy and power -
Elastic and inelastic deformation
E- An object will return to its original shape and size after the forces have been removed.
IE- an object will not return to its original shape and size -
Investigating Springs Practical?
See Practical sheet in folder -
How do levers act as force multipliers?
Levers can exert greater forces than the force applied to the lever by the effort.
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