4). A basketball player shoots the ball in the air. It moves through the air at 20 m/s and travels 25m. How long was the ball in the air? *

Let's start from this equation:

s = vt + s0

Know what it is? Of course you do. It's the equation used for knowing the position of an object in a certain period of time t.

s is space, v is speed, t is time, s0 is the initial space.

In this case the initial space is equal to 0 so our equation will become:

s = vt

Let's find t:

t = s/v

So:

t = 25m/20m/s = 1,25 s

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Hope it was helpful. Have a great day!

! 55 !  

write a paragraph or story to explain the transformation between potential and kinetic energy as shown in your picture or model.  

you should have at least 5 complete sentences with a main idea and supporting details.  

you must include the following words:  

potential energy

kinetic energy

mechanical energy

conservation of energy

dude, this is hard lol : ))

its c i just checked it