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Forces and Newton’s First Law

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Update Required To play the media you will need to either update your browser to a recent version or update your Flash plugin.

Update Required To play the media you will need to either update your browser to a recent version or update your Flash plugin.

Update Required To play the media you will need to either update your browser to a recent version or update your Flash plugin.

Update Required To play the media you will need to either update your browser to a recent version or update your Flash plugin.