I could use some help with the following physics questions:

At takeoff a commercial jet has a 65.0 m/s speed. Its tires have a diameter of 0.700 m. (a) At how many rpm are the tires rotating? rpm (b) What is the centripetal acceleration at the edge of the tire? m/s2 (c) With what force must a determined 10 15 kg bacterium cling to the rim? (d) Take the ratio of this force to the bacterium's weight. (force from part (c)/bacterium's weight) A fairgrounds ride spins its occupants inside a flying saucer-shaped container. If the horizontal circular path the riders follow has a 7.00 m radius, at how many revolutions per minute will the riders be subjected to a centripetal acceleration whose magnitude is 1.10 times that due to gravity? rev/min A 600 g squirrel with a surface area of 925 cm falls from a 5.6-m tree to the ground. Estimate its terminal velocity. (Use the drag coefficient for a horizontal skydiver. Assume that the squirrel can be approximated as a rectangler prism with cross-sectional area of width 11.5 cm and length 23 cm. Note, the squirrel may not reach terminal velocity by the time it hits the ground. Give the squirrel's terminal velocity, not it's velocity as it hits the ground.) m/ What will be the velocity of a 60.0 kg person hitting the ground, assuming no drag contribution in such a short distance? m/s