Shirley Temple was curling her hair when she dropped the curling iron.

Question

Shirley Temple was curling her hair when she dropped the curling iron. The curling iron fell 1.899 m to the floor. How long (in seconds) did it fall?

Answer 1

We will assume it will undergo acceleration due only to gravity.

 

a = -g = -9.8 m/s²

 

 

Since the acceleration is constant, we can use

 

            Δy = v_it + ½at²

 

to figure out the time.

 

 

With v_i = 0, t = √(2Δy/a) = √(2*1.899/9.8) = 0.623 s