number 3 & 4B

Number 3 & 4B

3. 0/1 points Previous Answers SERPSE 10 6.4.P.018. My Notes Ask Your Teacher V The mass of a sports car is 1200 kg. The shape of the car is such that the aerodynamic drag coefficient is 0.250 and the frontal area is 2.10 m. Neglecting all other sources of friction, calculate the Initial acceleration of the car, it has been traveling at 80 km/h and is now shifted into neutral and is allowed to coast. (Take the density of air to be 1.295 kg/m.) Your response differs significantly from the correct answer. Hework your solution from the beginning and check each step carefully. m/s Need Help? Submit Answer Practice Another Version 4. 2/3 points Previous Answers SERPSE10 6.A.P.026. My Notes Ask Your Teacher Disturbed by speeding cars outside his workplace, Nobel laureate Arthur Holly Compton designed a speed bump (called the "Holly hump") and had it installed. Suppose a 1800-kg car passes over a hump in a roadway that follows the arc of a circle of radius 20.8 m as in the figure below. (a) If the car travels at 20.0 km/h what force does the road exert on the car as the car passes the highest point of the hump? magnitude 14968. 63 N direction (b) What is the maximum speed the car can have without losing contact with the road as it passes this highest point? 14.1 Your response differs from the correct answer by more than 10%. Double check your calculations. kmyh