A $10-$kg sphere with a $25\mathrm{.}0$ cm radius has a moment of inertia of $2/5$ MR$2.$ If a torque of $2\mathrm{.}0$ N$-$m is applied

to the object, the angular acceleration of the object is

A$)1\mathrm{.}0$ rad$/$s$2.$

B$)2\mathrm{.}0$ rad$/$s$2.$

C$)4\mathrm{.}0$ rad$/$s$2.$

D$)6\mathrm{.}0$ rad$/$s$2.$

E$)8\mathrm{.}0$ rad$/$s$2.$

$3.$ A man pushes a $2\mathrm{.}0-$kg block $5\mathrm{.}0$ m along a frictionless incline at an angle of $30$o with the horizontal at

constant speed. What is the work done by his force?

A$)0$ J

B$)98$ J

C$)34$ J $30$o

D$)62$ J

E$)49$ J