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Yes, friction is useful because it can cause heat. Rub your hands together and notice that they will get warm. HEAT!!!

Above: not from Marbles48. hehehe.

Actualy, it is soo useful that it can be used for anything from launching a ball in to the air, to a rocket to the moon. i know because i have been in a friction-launched rocket to the g17 sector of the atmosphere!

ask about g17 sector and I'll answer that for you too!

Marbles48.

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13y ago

What else can I help you with?