Assume a freely falling object were somehow equipped with a speedometer on a planet where the acceleration due to gravity is 20 meters per square second. by how much would its speed reading increase each second?

the velocity will increase 20 m/sec each second

Explanation:

We have given that the acceleration due gravity is

We have to find the increase in the speed each second

We know that acceleration is nothing but rate of change of velocity as it changes so the speed will also changes with 20 m/sec  

For proper understanding

As the object is falling freely so initial velocity u =0 m/sec

Acceleration due to gravity

Time - 1 sec

From first law of motion

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000