# Rotational Mechanics (Assertion & Reason)

Assertion: A solid sphere and a hollow sphere are rolling on the ground with same total K.E. If transnational K.E of solid sphere is K, then translation energy of hollow sphere should be greater than k.

Reason: In case of hollow sphere rotational K.E is less than its transnational K.E

865

Assertion:- False
Reason:- True.

• Himanshu Giria plz explain how ?
• Himanshu Giria y is the assertion false ...
• Soumyadeep Basu You can express the rotational kinetic energy in terms of translational kinetic energy using v=rw. Then equating their total energies, you'll get the answer for the assertion part.
• Himanshu Giria Thanx
591
Akshay Ginodia ·

Assertion-False
Reason-False

213
Nandikesh Singh ·

Assertion - False
Reason - True

486
Niraj kumar Jha ·

K.E for hollow sphere=12mv2 +12*2mr2v23r2 (transnational K.E.+rotational K.E )
K.E. for solid sphere=12mv'2 +12*2mr2v'25r2
Equating the two we get,v<v'
Therefore,Assertion is False.
From the first expression,Reason is True

591
Akshay Ginodia ·

Yaa sorry the reason shud be true