Overall physics Flashcards
What is Newton’s first law?
An object will remain at a constant velocity unless a resultant force acts upon it.
What is Newton’s second law?
When the forces are balanced, an object’s motion would remain at a constant velocity. The object’s motion would change speed or direction if the forces are unbalanced.
F = ma
What is Newton’s third law?
For every action, there is an equal and opposite reaction.
Where is chemical energy stored?
Stored in food, fuel and battery
Where is thermal energy stored?
Stored in a hot object.
Where is kinetic energy stored?
Stored in moving objects
Where is elastic potential energy stored?
Stored in stretched, squashed objects.
Where is nuclear energy stored?
Stored inside atoms
When is mechanical work transferred?
Transferred when force is applied over a distance.
Where is GPE stored?
Stored in objects above the ground
Where is heat energy transferred?
Transferred between objects at different temperatures
How is light energy transferred?
Transfers energy via waves even in a vacuum
Where is sound energy transferred?
Transfers energy via waves in a solid, liquid or gas.
Where is electrical energy stored?
Stored in charged particles within electrical fields
What does an energy transfer diagram show?
Shows that the energy is transferred to different types of stores and the energy is not created or destroyed
What is efficiency?
Efficiency tells us the percentage of useful energy transferred in a device or process
What is constant velocity?
A motion of an object with no resultant force acting upon it.
What is power?
Power is a measurement of the rate at which work is done.
What is temperature?
Temperature is a measure of the average kinetic energy of the particles within an object.
What is mass?
Mass is a measure of the amount of matter in an object. It is a scalar and is independent of an object’s location.
What is meant by the conservation of energy?
Energy can be transferred usefully, stored or dissipated, but it cannot be created or destroyed.
What are vector quantities?
Vector quantities are quantities that both have size (magnitude) and direction.
Examples include:
. Force
. Weight
. Displacement
. Velocity
. Acceleration
. Momentum
What are scalar quantities?
Scalar quantities are quantities that do not have direction. They only have a size (magnitude).
Examples include:
. Temperature
. Mass
. Energy.
. Distance
. Speed
. Density
What is a moment?
A turning effect of a force is called a moment.
