Aconstruction company is building a new neighborhood. throughout the neighborhood there is exposed dirt. what will most likely happen to the exposed dirt? a) it will start growing weeds. eliminate b) it will be washed away by rain. c) it will become contaminated by oil. d) rocks will damage construction equipment.

    v = 0

Explanation:

This is a relative velocity exercise, using the Galilean transformation

          v = v₁ + v '

where v₁ is the speed of the object with respect to the mobile system, v' the speed of the mobile system and v the speed of the object with respect to the fixed system.

We can also write this expression with subscripts

        v_at = v_am + v_mt

where v_at   velocity with respect to the ground

          v_am  speed respecting the mobile system

          v_mt   velocity of the mobile system with respect to the earth

System a mobile is the train with speed v ’= 50 mile / h

the speed of the ball with respect to the mobile system is v = - 50 mile / h

the velocity of the ball with respect to the fixed system is

         v = 50 -50

         v = 0