Have a look at some or all of these movies - they each show a different force and different resulting movement. What do you think is happening - and why? Type in your explanations and compare with others.

Downhill skiing does seem like something for nothing.

You don't have to work all the time!

422kb

777kb

189kb

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These folks have a lot of faith in the First Law!

Why is it so important to wear seat belts?

Freewheeling!

The more there are, the harder it gets.