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A child standing on a bridge throws a rock straight down.

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2. A child standing on a bridge throws a rock straight down. The rock leaves the child's hand...

3. An astronaut is in circular orbit in a satellite around the earth. The astronaut feels weightless because...

4. A quantity that remains constant in uniform circular motion is:

5. A block is place on the inclined plane is stationary...

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2. Here the child must first throw the rock at V=0. Then the gravitational acceleration is:
G =(v2-v1)/t=v2/t
since the ...

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