Question

Are the equations of motion applicable to objects moving vertically upwards
Say 8km/s maximum height covered.

Answer 1

yes but some changes to. acceleration replace by acceleration due to gravity g if move upwards then -g if falls freely then +g. S distance replace with Height h
v= u+at becomes
v= u+gt
v^2-u^2= 2as becomes
v^2-u^2= 2gh
S = ut+1/2at^2becomes
h = ut+1/2gt^2

Answer 2

yes but some changes to. acceleration replace by acceleration due to gravity g if move upwards then -g if falls freely then +g. S distance replace with Height h

v= u+at becomes

v= u+gt

v^2-u^2= 2as becomes

v^2-u^2= 2gh

S = ut+1/2at^2becomes

h = ut+1/2gt^2