A loop-the-loop on the Six Flags Shockwave roller coaster has a 10-m radius (Figure 1). The car is moving at 24 m/s at the bottom of the loop. Determine

 

the force exerted by the seat of the car on an 80-kg rider when passing inverted at the top of the loop. 

2. You have an irregularly shaped flat object. To find its center of mass you can do which of the following?

(a) Find a point where you can put a fulcrum to balance it.

(b) Push the object in different directions and find the point of intersection of the lines of action of the forces that do not rotate the object.

(c) Separate the object into several regularly shaped objects whose center of masses you know, and use the mathematical definition of the center of mass to find it.

(d) All of the above

(e) a and b only