Motion, Force, Energy & Power Flashcards
Definition of Force & unit.
Force is that which changes or tries to change, the state of rest of a body or the uniform motion of that body.
Newton (N)
Definition of Mass & unit.
Defined as the quantity of matter contained within a body.
Kilogram (KG)
Definition of gravity & unit
All free falling objects fall with the same constant velocity directed to wards earths surface.
M/S squared
Definition of weight and unit
The force with which a body is attracted to the centre of earth
Newton’s (N)
What is a scalar quantity?
Is any quantity that expresses magnitude only.
What is a vector quantity?
That expresses both magnitude and direction
What is velocity?
The rate of change of distance with respect to time.
M/S
What is acceleration?
Rate of change of velocity in respect to time.
M/S squared
What is retardation?
Deceleration
What is density?
The amount of mass in respect to unit volume.
What is pressure?
The amount of force acting on a unit area.
What is Linear motion?
Is motion in a straight line
What are the 4 ways of describing rotary motion?
Rpm
Revs/second
Degrees/second
Radians/second
How do you convert RPM into revs/second?
Rpm
Divided by 60
How do you convert rpm into degrees/second?
Rpm x 360
Divide by 60
