(Solved): 3. A 0.0750kg toy airplane is tied to the ceiling with a string. When the airplane's motor is sta ...

3. A $0.0750\mathrm{kg}$ toy airplane is tied to the ceiling with a string. When the airplane's motor is started, it moves with a constant speed of $1.23\mathrm{m}/\mathrm{s}$ in a horizontal circle of radius $0.350\mathrm{m}$, as shown below. (25 points) (a) Find the angle $?$ the string makes with the vertical. (b) Find the tension value in the string.