Question

4. The formula v= 64h gives the velocity v in feet per second of an object that

Answer 1

The velocity when the object falls from 84 feet is 73.32 ft/sec

Step-by-step explanation:

The formula is derived from the conversion of energy principle. As the object falls the potential energy changes into kinetic energy. The right formula is:

$v=\sqrt{64h}$

here,

v represents the velocity

and

h represents the height in feet.

We can plug in the value of height in the formula to get the value of velocity

So, Putting h=84

$v=\sqrt{64*84}\\=\sqrt{5376}\\=73.3212\ ft/sec$

Rounding off to nearest 100th

v=73.32 ft/sec

The velocity when the object falls from 84 feet is 73.32 ft/sec

Keywords: Velocity, Height

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