sea level with a velocity 10m/s. The downward accerlation due to the gravity is 10m/s^2 .
a)find the height of the stone at time t s.
b)when does the stone reach 25m above sea level?
c)what is the maximum height that the stone attains?
ans:
a) (-10e^-t)+10 m/s
b)3 s
c)45m
pls show clear steps,thx!
更新1:
why the velocity v at time t=10-10t? how can you get this?
