P2 - Resultant Forces Flashcards
What is resultant force?
The net force of all opposing forces
What is the formula that calculates force?
F = ma
Force = mass * acceleration
What are the 3 rules concerning resultant force (Newton’s laws of motion)?
If the resultant force on a stationary object is zero, the object will remain stationary
If the resultant force on a moving object is zero, it carry on moving at the same velocity
If there is a non-zero resultant force, the object will accelerate in the direction of the force
What is the rule that explains reaction forces?
When 2 objects interact, the forces they exert on each other are equal and opposite
What is friction?
A force that always acts in the opposite direction to movement
What are the 2 types of friction?
Between 2 surfaces in contact
When an object passes through a fluid (air or liquid) which is called drag
How does increasing speed affect frictional forces?
Increasing speed always increases the opposing friction force
