How much work does it take to raise a #2 kg # weight #1 m #?

1 Answer
Alippiun
Mar 3, 2016

#W=19.62J#

Explanation:

The equation of work, a type of energy transfer is given by #W=Fs# in which;

#W#=Work done, in Joule #(J)#
#F# = Force exerted or applied, in Newton #(N)# or # kg m s^(-2)#
#s# = Displacement/Distance, in metre or #m#

But then we only have information of mass, #m=2kg# and distance, #s=1m#. To find force, #F#, we use the equation of #F=ma# which is also equal to #F=mg# in which;

#m# = Mass of object, in kilogram or #kg#
#g# = Gravitational acceleration, in #m s^(-2)#

Thus;

#W=Fs#
#W=(mg)s#
#W=(2kg xx 9.81m s^(-2)) xx 1m#
#W=19.62kg m^2 s^(-2)# or #19.62N m# or #19.62J#

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