Question

ts speed reading would increase each second by If a freely falling object were equipped with a speedometer on a planet where the acceleration due to gravity is 20 m/s², then its speed reading would increase each second by __________.a. 10 m/s. b. 30 m/s. c. 20 m/s. d. 40 m/s. e. depends on its initial speed

Answer 1

Answer:

20 m/s

Explanation:

The acceleration of an object determines the increase in velocity per second.

In this case the acceleration is 20m/s^2.

$a=\frac{v}{t}=\frac{\frac{20m}{s}}{s}$

That is, the increase is 20m/s each second.

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Answer 2

Answer:

velocity will increase 20 m/sec each second

Explanation:

Given that the acceleration due gravity is $g=20m/sec^2$

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  $20m/sec^2$ so the speed will also changes with 20 m/sec  

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

Acceleration due to gravity g= 20 m/s²

Time = 1 sec

From first law of motion

$v=u+gt\\=0+20\times 1\\=20m/sec$

the velocity will increase 20 m/sec each second