A spotlight on the ground shines on a wall 15 meters away. A man 1.8 meters tall walks away from the spotlight toward the building. Write the height of the shadow (s) as a function of the distance (d) from the man to the building.

Explanation:

Let the distance from spotlight to wall be 15m, and distance from the man to the building be .

#Therefore the height of the shadow as a function of the above is

Hence, height of the shadow is expressed as s=(15-x)m

#See attached photo for illustration

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.