Forces Flashcards
What are the three effects of forces?
Change in speed,shape,direction
What is friction?
Friction is a force that opposes motion
What is mass?and its unit
Mass is the amount of material in the object. unit is in kg
What is the force of gravity?
All objects attract
What is weight
A force, it is the gravitaional pull of a planet on a object
What is gravinational feild strength
Is the force of weight per unit mass
What is the fromula for weight
w=mg
True or False: Gravity vaires on different planets
True
What is balanced forces?
Equal in size but acting in oppopsite directions
What is unbalanced forces?
Forces that are not equal in size and act in opposite directions
What is netwons first law of motion
That a object will remain at rest or in constant speed in a streight line unless acted upon by an external force
What is newtons second law of montion
The accelereation of a object is directly proportional to the size of the unbalanced force acting on it and inversly proportional to the mass of the object.
What is the formula for unbalanced forces
Fu=ma
What is newtons third law of montion
If A exerts a force on B, B will exert an equal force in the opposite direction
