ln a practical unit if the unit of mass become double and that of unit of time become half , then 8joule will be equql to ...... unit of work
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8 joules of work done can be expressed,as
Work =8joules=8kgm
2
/s
2
where units,
mass=kg
length=m
Time=second=s
Let the new units be KG,M and S
According to question ,new mass is double that of initial value.
KG=2kg
M=m (Since no change is mentioned)
S=
2
s
Work=8kgm
2
/s
2
=8(KG/2)×M
2
/(2S)
2
=
8
8
(KGM
2
/S
2
)
=1 Joule of work
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