4) While Prof. K. was stuck in airport over break, she saw someone riding a Modobag (the world's first motorized carry-on luggage) and immediately ordered one off Amazon. Once it got delivered, she took it for a test ride up the hill between the Student Union and the football stadium. Prof. K. started traveling with an unknown initial velocity and came to a complete stop after 25 ft. a) Clearly draw coordinate systems for Prof. K. travelling up the hill. Write out the necessary transformation arrays. b) Draw an FBD and IRD for the system. c) Rolling friction is a function of normal force, just like regular friction would be, therefore Frolling=Cr*N. Develop a symbolic equation for the friction force, Frolling, of the bag in terms of the other forces on the FBD (i.e. develop an expression for "N") d) The coefficient of rolling resistance, Crr between the wheels and the ground is equal to 0.0295. The combined weight of Prof. K. her packed Modobag is 180 Ibs. and the angle 0 = 15°. Calculate Prof. K.'s initial velocity in mph. [Ans to check: 14.65 mph] %3D to

4) While Prof. K. was stuck in airport over break, she saw someone riding a Modobag (the world's first motorized carry-on luggage) and immediately ordered one off Amazon. Once it got delivered, she took it for a test ride up the hill between the Student Union and the football stadium. Prof. K. started traveling with an unknown initial velocity and came to a complete stop after 25 ft. a) Clearly draw coordinate systems for Prof. K. travelling up the hill. Write out the necessary transformation arrays. b) Draw an FBD and IRD for the system. c) Rolling friction is a function of normal force, just like regular friction would be, therefore Frolling=Cr*N. Develop a symbolic equation for the friction force, Frolling, of the bag in terms of the other forces on the FBD (i.e. develop an expression for "N") d) The coefficient of rolling resistance, Crr between the wheels and the ground is equal to 0.0295. The combined weight of Prof. K. her packed Modobag is 180 Ibs. and the angle 0 = 15°. Calculate Prof. K.'s initial velocity in mph. [Ans to check: 14.65 mph] %3D to