vectors and scalars Flashcards
what is displacement
distance without change of direction
what are vectors?
physical quantities that have size and direction
examples of vectors
acceleration, momentum, force, weight and GFS
what are scalers?
physical quantities that have size but no specific direction
examples of scalers?
speed, distance, time, energy, mass and power
a size of a quantity is its?
magnitude
vectors have?
magnitude and direction
scalers have?
magnitude
what does newton’s third law of motion state?
when two objects interact with each other, they exert equal and opposite forces of each other.
what’s the unit of force?
newtons
what does newton’s first law of motion state?
if the forces acting on an object are balanced, the resultant force is zero and:
if the object is at rest it stays stationary
if the object is moving, it keep moving at the same speed and in the same direction
what is the calculation for moments?
moment = force x perpendicular distance from the line of action from the force of the pivot
what is moment?
the turning effect of the force
the moment can be increased by?
increasing the size of the force
explain a practical that investigating the turning effect of a force
idk