Physics

Problem

A ball A is dropped from rest from the top of an

80\,\text{m}

high tower. One second later, another ball B is projected vertically upward from the ground with a speed of

25\,\text{m}\,\text{s}^{-1}

. (Take

g = 10\,\text{m}\,\text{s}^{-2}

downward.) At what height above the ground will the two balls pass each other? a)

57\,\text{m}

28.8\,\text{m}

31\,\text{m}

48.8\,\text{m}