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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.
- List all
the givens -converted to standard SI units.
- What formula
would you use to find the tangential velocity from these givens?
- What formulae
would you use to find the centripetal force from these givens?
- What formulae
would you use to find the centrifugal force (also called the
“centrifical” force), from these givens?
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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.
- List all the givens -converted to standard SI units.
- What formula would you use to find the tangential
velocity from these givens?
- What variable would you look for to find the time
to complete a revolution?
- What formulae would you use to find the time to complete
a revolution?
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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.
- List all the givens -converted to standard SI units.
- What formula would you use to find the tangential
velocity from these givens?
- What formulae would you use to find the period of
motion?
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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.
- List all the givens -converted to standard SI units.
- List all the formulae to be used to calculate the
centripetal force exerted by the car.
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5 A passenger on a roller coaster feels 3 g’s at the top of a loop
while traveling 15 m/s.
- List all the givens -converted to standard SI units.
- List all the formulae to be used to calculate the loops
radius at the top.
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