Question

Three uniform spheres are fixed at positions shown in the figure (Figure 1).

Part A

What is the magnitude of the force on a 0.0150-kg particle placed at P?

Part B

What is the direction of this force? 

Part C

If the spheres are in deep outer space and a 0.0150-kg particle is released from rest 300 m from the origin along a line 45" below the -x-axis, what will the particle's speed be when it reaches the origin?