Question

If a marble is released from a height of 10 meters how long would it take to hit the ground?

Answer 1

S = ut + 0.5at^2 

10 = 0 + 0.5(9.81)t^2 {and if g = 10 then t^2 = 2 so t ~1.414}  

t^2 ~ 2.04 

t ~ 1.43 seconds