4.51 . DATA The table* gives automobile performance data for a few types of cars: Time (s) to go from Make and Model (Year) Mass (kg) 0 to 100 km/h Alpha Romeo 4C (2013) 895 4.5 Honda Civic 2.0i (2011) 1320 6.6 Ferrari F430 (2004) 1435 4.0 Ford Focus RS500 (2010) 1468 5.6 Volvo S60 (2013) 1650 7.4 *Source: www.autosnout.com (a) During an acceleration of 0 to 100 km/h, which car has the larg- est average net force acting on it? The smallest? (b) During this ac- celeration, for which car would the average net force on a 72.0 kg passenger be the largest? The smallest? (c) When the Ferrari F430 ac- celerates from 0 to 200 km/h in 12.2 s. what is the average net force acting on it? How does this net force compare with the average net force during the acceleration from 0 to 100 km/h? Explain why these average net forces might differ. (d) Discuss why a car has a top speed. What is the net force on the Ferrari F430 when it is traveling at its top speed, 315.4 km/h?5.108 .. Gina works in a travel- ing funfair. She rides a motorcycle inside a hollow, transparent plastic sphere. After gaining sufficient speed, she travels in a vertical circle with radius 14.2 m. She has mass 68.0 kg. and her motorcycle has mass 40.0 kg. (a) What minimum speed must she have at the top of the circle for the motorcycle tires to remain in contact with the sphere? (b) At the bottom of the circle, her speed is twice the value calculated in part (a). What is the magnitude of the normal force ex- erted on the motorcycle by the sphere at this point