Physics

Problem

A stone is projected vertically upward with an initial speed of

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

. Take

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

acting downward. Determine the displacement of the stone between

t=2\,\text{s}

and

t=4\,\text{s}

after projection. a)

10\,\text{m}

upward b)

0\,\text{m}

40\,\text{m}

upward d)

20\,\text{m}

upward