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A ball whooshes down a slide and hits another ball which flies off the slide horizontally as a projectile. How far does it go?

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Dam Busters 1

At what positions and speeds can the bomb be dropped to destroy the dam?

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Escape from Planet Earth

How fast would you have to throw a ball upwards so that it would never land?

Dam Busters 2

Stage: 5 Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3

Physical units must match up in a physically meaningful equation.

If you sum two quantities then the units must also be the same.