Do your work neatly on a separate sheet of paper.

1 A baton twirler spins her baton 11 times in 2 seconds when she throws it up in air. The baton is 50 cm long. On each end of the baton is a 0.25 kg rubber mass.

  1. List all the givens -converted to standard SI units.

  2. What formula would you use to find the tangential velocity from these givens?

  3. What formulae would you use to find the centripetal force from these givens?

  4. What formulae would you use to find the centrifugal force (also called the “centrifical” force), from these givens?

2 A space ship has a ring containing the crew living quarters. The ring’s outside floor is 15 m from the center of the ship. The ship rotates such that the astronauts feel 1 g on the outer floor.
  1. List all the givens -converted to standard SI units.

  2. What formula would you use to find the tangential velocity from these givens?

  3. What variable would you look for to find the time to complete a revolution?

  4. What formulae would you use to find the time to complete a revolution?

3 An athlete is participating in the “hammer throw.” He swings a 15 kg ball around in a circle with a constant centripetal acceleration of 2 g’s. The circle’s radius is 2.0 m as measured parallel with the ground.

  1. List all the givens -converted to standard SI units.

  2. What formula would you use to find the tangential velocity from these givens?

  3. What formulae would you use to find the period of motion?


4 A car drives around in a circle on an ice covered parking lot with a speedometer reading of 25 mph, 11.12 m/s. The 1100 kg car is circling in a radius of 40 m.

  1. List all the givens -converted to standard SI units.

  2. List all the formulae to be used to calculate the centripetal force exerted by the car.

5 A passenger on a roller coaster feels 3 g’s at the top of a loop while traveling 15 m/s.

  1. List all the givens -converted to standard SI units.

  2. List all the formulae to be used to calculate the loops radius at the top.

 


March 15, 2013 1:46 PM

by Tony Wayne ...(If you are a teacher, please feel free to use these resources in your teaching.)

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