Forces In Balance Flashcards
Example of a scalar quantity
Distance
What is a scalar quantity?
Just a magnitude
What is a vector quantity?
Direction and magnitude
Example of a vector quantity?
Displacement
What are forces?
Interactions between objects
What is force measured in?
Newtons (N)
Examples of Non-Contact forces
Gravitational force, Magnetism, Electrostatic
Examples of Contact forces
Normal force, Tension, Friction, Air resistance, Water resistance, Upthrust, Thrust
What is Newton’s third law?
For every action there is an equal and opposite reaction
What is the equation for weight?
Weight = Mass x Gravitational Field Strength
What is weight measured in?
Newtons (N)
What is mass measured in?
Kilograms (kg)
What is gravitational field strength measured in?
Newtons per kilogram (N/kg)
What are resultant forces?
The result of other forces
Where is the centre of mass in a symmetrical object?
The point where it’s axes of symmetry meet
What is the centre of mass?
A point where all the weight can be considered to act from
What is the equation for moment?
Moment = Force x Distance
What is moment measured in?
Newton metres (Nm)
What is equilibrium?
When two forces are balanced
What is work done?
Energy transferred
What is the equation for work done?
Work done = Force x Distance
When two forces are acting in the same direction on an object how do you calculate the resultant force?
Add the forces
When two forces acting in opposite directions how do you calculate the resultant force?
Subtract the forces
What is a free body diagram?
A diagram that shows all forces acting on one object
