Answered

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a penny dropped into a wishing well reaches the bottom in 1.5 seconds. what was the velocity at impact?

Sagot :

AL2006idn

At the surface of the Earth, the acceleration of all objects due to gravity
is about 9.8 m/s². 

So an object that's acted on by no other forces except gravity increases
its speed by 9.8 m/s every second. 

If the object is dropped from "rest" (zero speed), then after 1.5 seconds
have passed, it's falling at (1.5 x 9.8) = 14.7 m/s .

Its velocity is 14.7 m/s in the direction of straight down.


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