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
what piece of equipment can be used to measure an objects weight?
A calibrated spring-balance or newton-meter
what is the name given to the single force that is equivalent to all the other forces acting on a given object?
The Resultant Force
