forces and their interactions Flashcards
what is a scalar quantity?
- a quantity that only has magnitude
- a quantity that isn’t direction dependent
what is a vector quantity?
a quantity that has both magnitude and direction
how can a vector quantity be drawn and what does it show?
- as an arrow
- the length of the arrow represents the magnitude
- the arrow points in the direction
what is a force?
a push or pull acting on an object due to an interaction with another object.
what are the 2 categories that all forces can be split into?
- contact forces
- non-contact forces
give 3 examples of contact forces.
- friction
- air resistance
- tension
give 3 examples of non-contact forces
- gravitational forces
- electrostatic forces
- magnetic forces
is force a vector a scalar quantity
vector, it has both magnitude and direction.
give 3 examples of vector quantities
- velocity
- displacement
- force
give 3 examples of scalar quantities
- temp
- time
- mass
- speed
- distance
- energy
what is weight?
the force that acts on an object due to gravity and the objects mass.
what quantities does weight depend on?
- the objects mass
- the gravitational field strength at the given position in the field
what is the unit used for weight?
Newton
what is the unit for gravitational field strength?
N/Kg
what is meant by an objects centre of mass?
The single point where an objects weight can be considered to act through
