Tuesday

April 21, 2015

April 21, 2015

Posted by **Max** on Tuesday, February 16, 2010 at 2:58am.

(a) The force of the Earth pulling down on the bike.

(b) The force of the bike pulling up on the Earth.

(c) The force of the hook pulling up on the bike.

(d) The force of the hook pulling down on the ceiling.

Which two forces are equal and opposite because of Newton's third law?

Which two forces are equal and opposite because of Newton's first law?

I would like to say A and B for the first question and A and C for the second one but I'm not sure

- Physics -
**Damon**, Tuesday, February 16, 2010 at 6:12amYes a and b for the first one, the force the bike exerts on earth is the same magnitude as the force earth exerts on the bike.

Yes c and d for the second one. The net force on the hook is zero so its momentum does not change.

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