Flashcards in Forces Deck (11):
What is a vector?
Vectors are quantities that are fully described by both magnitude and a direction
What is a scalar?
Scalars are quantities that are fully described by a magnitude alone.
List 6 different scalar quantities.
List vector quantities.
Is weight scalar or vector.
Vector - its direction is downwards
Defintion of resultant forces
overall force on a point or object
Why is a resultant force needed?
A resultant force is needed to change the velocity of an object.
Resultant force equation
Mass x Acceleration
Centre of mass definition (1)
the center of mass of a distribution of mass in space is the unique point where the weighted relative position of the distributed mass sums to zero
Centre of mass definition (2)
the point where if a force is applied it moves in the direction of the force without rotating