Defining Force
Key Questions
-
No, force is a vector quantity, it is defined by its magnitude and direction.
Common vector quantities are displacement, velocity, acceleration and force.
Common scalar quantities are distance, speed, work and energy.
also, check out this incredible video;
Brian Swarthout
·
1
·
Jul 7 2014
-
Put simply, a force is something which changes the momentum of an object. The magnitude of a force is the rate of change of momentum caused.
This is shown by manipulation of the famous equation
#F=ma# #F=ma=m(v_(f)-v_i)/t=(p_(f)-p_i)/t# Where
#F# is the force
#m# is the mass of the object
#a# is acceleration, which is the rate of change of velocity
#v_i# is the initial velocity of the object which the force acts upon
#v_f# is the object's final velocity
#t# is time
#p# is momentum, which is equal to#mxxv# Extra info:
Of course, because force is the rate of change of momentum, it can be linked to an object whose mass changes while velocity remains constant.#F=(p_(f)-p_i)/t=v(m_(f)-m_i)/t# Where
#m_f# is final mass and#m_i# is initial mass.Force can also be related to an object whose mass and velocity change simultaneously, but those equations involve calculus, so I won't include those here.
Mike G.
·
5
·
Sep 23 2014