Resultant forces Flashcards
A force can change the ________ of an object or change its state of _____ or its ___________
A force can change the SHAPE of an object or change its state of REST or its MOTION
What is a contact force?
the objects are physically touching
What is a non-contact force?
the objects ante physically separated
Example of contact forces
Friction
Air resistance
Water resistance
Upthrust
Examples of non-contact forces
Gravity
Electromagnetic Field Strength
What is newtons 3rd law?
When 2 objects interact with each other they exert equal and opposite forces on each other
What is newtons 1st law?
When the forces acting on a object are balanced, the resultant force is zero
* if it is stationary, it remains stationary
* if it is moving, it stays at a constant speed in a constant direction
A car is travelling, what force is going up?
Normals reaction/ contact force
A car is travelling, what force is going down?
Weight
A car is travelling, what force is going backwards?
Air resistance and friction from tyres
A car is travelling, what force is going forwards?
Power from the engine (thrust force)
What is equilibrium
The resultant force on the object is 0. The forces acting on the object will not cause it to turn
