The motion of a linear oscillator may be represented by means of a graph in which x is shown as abscissa and dx/dt as ordinate. the history of the oscillator is then a curve. (a) show that for an undamped oscillator this curve is an ellipse. (b) show (at least qualitatively) that if a damping term is intro- duced one gets a curve spiraling into the origin.

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j