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Head First Physics by Heather Lang

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Chapter 6. Displacement, Velocity, and Acceleration: What’s going on?

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It’s hard to keep track of more than one thing at a time.

When something falls, its displacement, velocity, and acceleration are all important at the same time. So how can you pay attention to all three without missing anything? In this chapter, you’ll increase your experiment, graph, and slope superpowers in preparation for bringing everything together with an equation or two.

Just another day in the desert ...

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...and another Dingo-Emu moment!

Every year it’s the same. The Dingo wants to invite the Emu to his birthday party - but the daft bird won’t stop running for long enough for him to deliver the invitation. So this year, the Dingo’s decided that extending a paw of friendship needs drastic measures. He’s hired a crane, and wants to push a cage off the platform the moment the Emu rounds the bend. But is this practical? What height does the platform need to be, and will the cage be able to handle hitting the ground at a high speed?

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So the Dingo calls the crane company’s customer service department to ask some questions ...

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