The next two questions are worth 10 points in total. For both questions, consider the following scenario: A 20 kg cart slides on the track shown with negligible friction. The cart executes the loop-de-loop and the figure shows the cart (upside-down) at the top of the track with radius 3.0 m. At this point, the cart's speed is 9.0 m/s. What is the magnitude and direction of the normal force that the track exerts on the cart?
1. What is the direction of the normal force that the track exerts on the cart?
A. down
B. up
C. left
D. right
2. What is the magnitude of the normal force that the track exerts on the cart?
A. 736N
B. 540N
C. 196N
D. 442N
E. 344N