Question

An icicle falls from the eaves of the house. What is the speed at which the stick hits the ground if it takes 2.1 seconds to fall? And the answer must be both meters per second and kilometers per hour

Answer 1

The final speed of an icicle

$$v_f=v_i+gt$$

$$=0\:\rm m/s+9.8\:\rm m/s^2\times 2.1\: s=20.58\: m/s=74\: km/hr$$