Centripetal Acceleration The rotating platform is not friction free. Friction will cause an angular acceleration that will cause the platform to slow down. How will this acceleration effect your measurements of the centripetal acceleration (or, if it has no effect, why not )? If you are sitting one meter from the center of a merry go round which spins at 3 RPM, you have to hold on or you will fall off. Which situation will require you to hold on the hardest: continuing to spin 3 RPM, buy holding on at 2 meters from the center, or continuing to hold on at 1 meter from the center but spinning 6 RPM? (Why? What formula are you using?)

Please refer to the picture when answering these questions... 1) We want to determine a rotation rate that will create a radial acceleration equivalent to gravitational acceleration on Earth. Which of the following is an equation that could be used to achieve this goal?            a) g = v^2/R           b) g = m v^2/R           c) g = v^2/R - Fn/m           d) mg = m v^2/R + Fc 2) Velocity can be represented as distance over time. If T is the amount of time it takes the station to make one full rotation, which of the following is an equivalent expression for velocity?           a) v = 2πR/T          b) v = πR^2/T          c) v = T/2πR          d) v = 2πRT 3) The tube shown here has an outer radius of 1 km. If the acceleration of 10 m/s^2 is desired, about how long should one rotation take?         a) 10 seconds         b) 1 minute         c) 10 minutes         d) 1 hour  4) What is the tangential speed of a person standing inside the station? answer in m/s   Please answer all…

After eating all your candy, you ride the Silly Silo, which sounds like an awful idea. The Silly Silo is a ride that used to be at Adventure Land. Watch the video at this link to see how it works. Notice that the floor drops out and everyone stays stuck to the wall. Imagine that the Silly Silo has a diameter of 5.5 m and it spins with a tangential velocity of 6.1 m/s. - What is the centripetal acceleration of a person stuck against the wall? - What is the minimum coefficient of friction that allows everyone to stick to the wall (and not slide up or down) during the ride.

3. You stand on a merry-go-round which is spinning at f = 0.25 revolutions per second. You are R= 200 cm from the center. Figure-3 (a) Find the angular speed w at which it is spinning. (b) Find the centripetal acceleration, a, with which it is spinning. (c) What is the minimum coefficient of static friction 4, between your shoes and the floor that will keep you from slipping off?