A skateboarder rolls off the top of a staircase horizontally and lands at the bottom of the stairs. If the height of the stairs is 12 meters and his initial speed was 10 m/s. How long was the skateboarder airborne?

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

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