Topic 5 Forces Flashcards
What are scalar quantities?
Magnitude only
What are vector quantities?
Magnitude and direction
What are 5 examples of vector quantities?
Force
Velocity
Displacement
Acceleration
Momentum
What are 5 examples of scalar quantities?
Speed
Distance
Mass
Temperature
Time
How is a vector quantity represented?
Arrow
What does the length of the arrow for a vector quantity show?
Magnitude
What does the direction of the arrow of a vector quantity show?
Direction of quantity
What is a force?
Push or pull that acts on object due to interaction with another object
What are 4 examples of contact forces?
Friction
Air resistance
Tension
Normal contact force
What are 3 examples of non contact forces?
Gravitational
Electrostatic
Magnetic
What happens when 2 objects interact?
Force produced on both objects
What is an interaction pair?
Pair of forces that are equal and opposite and act on 2 interacting objects
What does gravity attract?
All masses
What is mass?
Amount of ‘stuff’ in object
What is weight?
Force acting on object due to gravity
What is the force of gravity close to earth due to?
Gravitational field around earth
What are the 2 ways a gravitational field is stronger?
Closer to mass causing field
Larger masses
Why does the weight of an object change with location?
Depends on gravitational field strength at location of object
What is the equation to calculate weight?
Weight = mass x gravitational field strength
What is weight measured with?
Calibrated spring balance (Newton meter)
Where is the weight of an object considers to act at?
Single point, referred to as ’centre of mass’
What is an objects ’centre of mass’?
Point you can assume whole mass is concentrated
What is the relationship between the weight and the mass of an object?
Directly proportional
