Flying Circus of Physics An amusement park ride consists of a car moving in a vertical circle on the end of a rigid boom of negligible mass. The combined weight of the car and riders is 4.00 kN, and the radius ofthe circle is 8.30 m. At the top of the circle, {a} what is the force F3 on the car from the boom (using the minus sign for downward direction) if the car's speed is v : 6.00 m/s? {b} What is F3 if v : 14.0 m/s? (a) Number n Units v (b) Number n Units v