Question

a stone is dropped from (a) height of 40m. (a) How much time will it take to reach the ground? (b) With what velocity will it strike the ground?

Answer 1

they still provide formulas in the lessons dont they? which formulas would you use?

Answer 2

so do you know g=9,6 m/s^2 what mean ?

Answer 3

Use the equations:
(a) \[s=ut+\frac{ at^{2} }{ 2 }\]
(b) \[v=u+at\]
u->intial velocity, t->time takem, a->acceleration, s->displacement
Make use of proper signs for variables as they are vector quantities(except time)