A stone is dropped from the top of a tower

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A stone is dropped from the top of a tower. One second later, a second stone is thrown vertically downward with velocity

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

. The second stone will overtake the first after travelling a distance of, with

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

: (1)

13\,\text{m}

(2)

15\,\text{m}

(3)

11.25\,\text{m}

(4)

19.5\,\text{m}