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

1 Answer
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