Question 287: Work, Energy and Power & Circular Motion

Question

A uniform chain of length 3 meter and mass 3 kg overhangs a smooth table with 2 meter lying on the table. If k is the kinetic energy of the chain in joule as it completely slips off the table, then the value of k is ................. . (Take g = 10 m/s
2
)

Accepted Answer

From energy conservation
K
i
+ U
i
= k
f
+ U
f
$$0 + \left( { - 1 	imes 10 	imes {1 \over 2}} ight) = {k_f} + \left( { - 3 	imes 10 	imes {3 \over 2}} ight)$$
$$-$$5 = k
f
$$-$$ 45
k
f
= 40 J

Work, Energy and Power & Circular Motion

A uniform chain of length 3 meter and mass 3 kg overhangs a smooth table with 2 meter lying on the table. If k is the kinetic energy of the chain in joule as it completely slips off the table, then the value of k is ................. . (Take g = 10 m/s 2 )

Integer / Numeric Answer Type