You walk south for 12.5 km, west for 8.9 km, and then north for 5 km. What is the magnitude and direction
of your resultant displacement?

If two metal balls each have a charge of -10^-6 c and the repulsive force between them is 1 n, how far apart are they? (coulomb's constant is k = 9.0x 10^9 n-m^2/c^2? 9.5 m 9.0 mm 9.5 cm 0.9 m .

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

What is the moment of inertia i of this assembly about the axis through which it is pivoted? express the moment of inertia in terms of mr