Dynamics - position, velocity acceleration

(See attached file for full problem description) I need help with question 11.10

Mechanical Engineering Dynamics

An airplane flies with constant velocity along a circular path in the vertical plane. Th radius of the circular path is 5000 ft. The pilot weighs 150 lbs. a. Determine the velocity of the airplane required for pilot to experience weightlessness at the top of the circular path. b. Determine the force exerted on the piot by the airplane if the airplane is traveling twice the velocity determined in part (a).

Mechanical engineering dynamics

A car and a high -speed trian at constant speeds. three seconds after the train passes under the highway bridge the car crosses the bridge. a. Determine the magnitude of the velocity of the train relative to the automobile. b. The change in position of the train relative to the automobile during a four second interval. c. The distance between the train and the automobile five seconds after the automobile has crossed the bridge.

Mechanical Engineering Dynamics

A 3000 lb car rests on a horizontal street out of gas with its brakes locked. Find the magnitude of the force P, required by the person pushing the vehicle to give the car an accelration of 1 ft/s^2. The coefficient of kinetic friction between the car and the street is (.25). Thank You!

NEWTONS LAWS QUESTION 12.21 PART A

I NEED SOME HELP WITH PROBLEM 12.21 part A THIS IS ONLY FOR PART 1 CAN YOU PLEASE INCLUDE SOME FREE BODY DIAGRAM F0R EASY UNDERSTANDING. (See attached file for full problem description)