Weight and Circular Motion Flashcards
What is mass?
The amount of ‘stuff’ in an object, and is the same anywhere in the universe.
What is mass measured in?
Kilograms (kg).
What is weight?
The force acting on an object due to gravity (the pull of the gravitational force on the object).
What is weight measured in?
Newtons (N).
What is the formula to calculate weight?
w = mg
Weight (N) = Mass (kg) x gravitational field strength (N/kg)
What is the name of the force that keeps something moving in a circle?
Centripetal force.
If an object is travelling in a circle at a constant speed, what is constantly changing?
The velocity is constantly changing.
On an object moving in a circle, what is the direction of the force?
The force is always acting towards the centre of the circle.
On an object moving in a circle, what is the direction of velocity?
The velocity is perpendicular to the direction of the force.
What is the relationship between weight and gravitational field strength?
As gravitational field strength increases, so does the weight of an object.
Gravitational field strength depends on location, so weight also depends on location.
What is the relationship between mass and gravitational field strength?
There is no relation - gravitation field strength has no effect on mass.
Mass is the same anywhere in the universe.
