Question

A solid metal ball and a hollow plastic ball
of the same external radius are released from
rest in a large vacuum chamber.
When each has fallen 1 m, they both have
the same
1. momentum.
2. inertia.
3. speed.
4. change in potential energy.
5. kinetic energy.
... Same Speed. That is what Galileo's experiment in Pisa was all about.
plz help me in Physics practicals.
1 chapter.
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While you are at it, what is a "physics practical"?

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