Speed & Force Flashcards
What is speed?
Distance travelled per unit of time (m/s).
What is velocity?
Speed in a given direction.
What is acceleration?
Change in velocity over time (m/s2)
What is instantaneous speed?
The speed of an object at a precise moment in time.
What is average speed?
The speed that an object has travelled if it maintained a constant speed.
What is force?
An action that can change the motion of an object or deform it.
What is gravitational force?
A force of attraction acting between all objects as a result of their masses and distances between them.
What is mass?
The measure of the quantity of matter in an object.
What is weight?
The measure of the gravitational force acting on an object.
What is electromagnetic force?
Force of attraction or repulsion between two objects with an electrical charge or with magnetic poles.
What is friction?
A force that prevents two objects from slipping over each other when they come into contact.
What is strong and weak nuclear force?
A high-intensity force of attraction that holds protons and neutrons together.
What is resultant force?
The combination of all the forces applied simultaneously to an object.
What is equilibrium of two forces?
When a resultant force is zero. The motion of the object therefore remains constant.
