Forces Flashcards
What is a SCALAR QUANTITES
Only have a magnitude and no direction
What are examples of SCALAR QUANTITIES
Speed Mass Distance Time Temperature
What is a VECTOR QUANTITIES
Have a magnitude and a direction
What are 5 examples of VECTOR QUANTITIES
Force Displacement Momentum Velocity Accerleration
What is the definition of FORCE
A push or pull on an object caused by it intertracting with something.
What are the two types of forces?
Contact forces
Non-contact forces
What is the defintion of a CONTACT FORCE
Forces that occur by two or more objects touching
What is the definition of a non-contact force
Forces that occur between two or more objects that are not touching
What are 4 examples of a contact force
1) Friction
2) Tension
3) Air resistance
4) Normal contact force
What are 3 examples of non-contact forces
1) gravitaional force
2) electrostatic force
3) magnetic force
What is the definition of weight
A force that acts on an object due to gravity
What is the equation to calculate weight
W = mg
Weight(N) = mass(kg) x gravitational field strength(N/kg)
What is the definition of a free body diagram
Shows all forces acting on an isolated object (taken from the centre of mass)
What is the definition of equilibrium
When the forces acting on an object are balanced and the resultant force is zero.
What is the definition of a resultant force
A single force that can replace all the forces acting on an object and give the same effect as the original forces acting together.
How do you calculate the resultant force
Add forces pointing in the same direction together. subtract forces pointing in the opposite direction
F1 - F2 = resultant force
What is the definition of work done
When a force moves an object from one point to another, energy is transferred and work is done the object.
What is the equation of work done
W = Fs
Work done(J) = Force(N) x Distance(M)