4.5.1 Forces and their interactions (will come up) P2 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 a magnitude and a direction
How can a vector quantity be drawn and what does it show
As an arrow
Length of the arrow represents the magnitude
The arrow points in the associated 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
3 examples of contact forces
Friction
Air resistance
Tension
3 examples of non-contact forces
Gravitational forces
Electrostatic forces
Magnetic forces
Is force a vector or a scalar quantity
Vector
It has both magnitude and direction
3 examples of vector quantities
Velocity
Displacement
Force
Examples of scalar quantities
Temperature Mass Time Speed Distance Energy
What is weight
The force that acts upon an object due to gravity and the object’s mass
Units for weight
N
Newton
Unit for gravitational field strength
N/kg
What is meant by an objects centre of mass
The single point where an object’s 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
