Gravity homework

Read my earlier notes on gravitational acceleration.  Some of it may be confusing, but try your best.

Then try these:

1.  A ball is dropped from rest and falls with no air resistance.

A.  How fast is it traveling after 2,5 seconds, assuming that it hits nothing?

B.  How far will it have fallen in this time?

2.  What does it mean to be weightless?  Give an example as well.

3.  Challenge question.  A rock is dropped from a bridge above a river and lands 1.5 seconds later?  How far above the river is the bridge?


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