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

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

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