A wheel rotating at an angular speed of 20" rads"^(-1), is brought to rest by a constant torque in 4s. If the M.I. is 0.2" kg m"^(2) , the work done in first 2s is

A wheel rotating at an angular speed of 20" rads"^(-1), is brought to

1.	A wheel rotating at an angular speed of 20" rads"^(-1), is brought to rest by a constant torque in 4s. If the M.I. is 0.2" kg m"^(2) , the work done in first 2s is
Answer» 50 J 30 J 20 J 10 J Answer :B