A 30 kg particle with velocity v 50 ms - 60 ms is at x 30

Question

A 3.0 kg particle with velocity v = (5.0 m/s) - (6.0 m/s) is at x = 3.0 m, y = 8.0 m. It is pulled by a 7.0 N force in the negative x direction.

(a) What is the angular momentum of the particle about the origin?

kg·m2/s

(b) What torque about the origin acts on the particle?

N·m

(c) At what rate is the angular momentum of the particle changing?

kg·m2/s2