An Object Is Rotating with an Angular Momentum of Magnitude

Multiple Choice

An object is rotating with an angular momentum of magnitude 20.0 kg∙m²/s in a direction directly east. A torque of magnitude 10.0 N∙m acts in a direction 30° north of east acts on the object for 5.00 s. What is the angular momentum after the torque has acted?

A) 45.0 kg∙m²/s, 51.3° north of east
B) 68.1 kg∙m²/s, 21.5° north of east
C) 25.0 kg∙m²/s, 51.3° north of east
D) 63.3 kg∙m²/s east
E) 32.0 kg∙m²/s, 51.3° north of east