QQ: Victor was skate boarding down the sidewalk at 5.4 m/s when he noticed a huge crack in the sidewalk. He immediately began slowing down when he was.

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QQ: Victor was skate boarding down the sidewalk at 5.4 m/s when he noticed a huge crack in the sidewalk. He immediately began slowing down when he was 15 m from the crack. He managed to stop just before reaching the crack and avoided a terrible fall. How long did it take him to stop?

What methods did you use? Place a coin or a paper clip on the table in front of you. See how many ways you can move that object to the other side of the desk without lifting it off the table. What methods did you use?

Use the string in the container to perform the Launch Lab on page 87 of your Physics Book.

Forces cause changes in motion.