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Bell Work: Torque Review

Bell Work: Torque Review. The force must be exerted ______ to the lever arm. The pivot point is called a _______. In equilibrium, the clockwise torque is equal to the ________ torque. The unit for torque is ______. Torque is calculated by multiplying _____ and ______.

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Bell Work: Torque Review

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  1. Bell Work: Torque Review • The force must be exerted ______ to the lever arm. • The pivot point is called a _______. • In equilibrium, the clockwise torque is equal to the ________ torque. • The unit for torque is ______. • Torque is calculated by multiplying _____ and ______.

  2. * You should have 15 bell work assignments for October.* Please turn them in if you have them today.* Tomorrow is okay too.* Pick up a universal gravitation note guide.

  3. Universal GravitationNewton wrote this one too. It applies to everything in the universe!

  4. What type of force allows a balloon to stick to the wall? • Every massin the universe reaches out and pullson every other massin the universe. • Gravitational forces are the smallestforces in nature.

  5. What forces are present in the nucleus of an atom? • Most gravitational forces go unnoticed. • Ex: Two pencils don’t roll towards each other on a desk. • Ex: Cars in traffic aren’t attracted to each other. • Gravitational force and weightare the same thing when you are on a planet.

  6. What forces are present in the nucleus of an atom? • Gravitational forces are affected by distancebetween the objects’ centers and both of their masses. • Newtonwrote the Universal Law of Gravitation:

  7. Ever walk past a building and stick to it because of its gravitational pull?

  8. When have you felt less gravitational pull? • more distance = lessgravitational force; distance and force are inversely related • less mass = lessgravitational force; mass and force are directlyrelated

  9. Where can you go to have no gravitational force? • double distance = ¼gravitational force • quadruple distance = 1/16gravitational force • double mass = double force • double both masses = quadruple force

  10. What happens to FG if the distance is cut in half? • Example Problem 1: What is the gravitational force between tow dogs, 5 kg and 7 kg that are 2 meters apart? • G = 6.67 x 10-11 r = 2 m • m1= 5 kg m2 = 7 kg F = ?

  11. What planet would you most want to visit? Does it have more or less gravity than the earth? F = 20.5 N

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