A 2.0-kg mass in the xy plane is moving in the negative x direction at 3.0 m/s along the line y = 5.0 m. As the mass passes across the y axis (i.e., passing the point (x, y = 0, 5.0 m)), what is its angular momentum with respect to the z axis?

Question

Quizplus · Accepted Answer

The angular momentum of the mass with respect to the z axis is given by:$$L_z = mvr$$where:* m is the mass of the object* v is the speed of the object* r is the distance from the object to the z axisIn this case, the mass is 2.0 kg, the speed is 3.0 m/s, and the distance from the object to the z axis is 5.0 m. Therefore, the angular momentum is:$$L_z = (2.0 	ext{ kg})(3.0 	ext{ m/s})(5.0 	ext{ m}) = 30 	ext{ kg m}^2/	ext{s}$$Therefore, the correct answer is A.

A 20-Kg Mass in the Xy Plane Is Moving in the the Negative