1.

A uniform chain of length 2m is kept on a table such that a lengthof 60 cm hangs freely from the edge of the table. The total mass of the chain is 4kg. What is the work done in pulling the entire chain on the table?

Answer»

7.2 J
3.6 J
120 J
1200 J

Solution :MASS per unit length `=(4kg)/(2m)=2kgm^(-1)`
Mass of 60 cm length `=1.2 kg`
WEIGHT of hanging part `=1.2xx10=12N`
`W=FxxS=12xx0.3=3.6J`


Discussion

No Comment Found