A stunt car (1100 kg) is traveling from UTEP to Alamogordo and is driving 30 m/s

Question

A stunt car (1100 kg) is traveling from UTEP to Alamogordo and is driving 30 m/s on the overpass shown in Figure What is the normal (radial) acceleration of the car on the overpass? a) 2.4 m/s^2 b) 3.7 m/s^2 b) 4.6 m/s^2 d) 7.2 m/s e) 5.3 m/s^2 The stunt car jumps the ledge of the overpass at 20 degree above horizontal at the speed listed above. How much time would the car be in flight before landing on a flatbed stunt truck northbound on Gateway N Blvd, 10 m below? What would be the maximum height (above the truck) that the car would achieve? a) 17.3 m b) 13.7 m c) 11.2 m d) 15.4 m e) 12.4 m What horizontal distance (range, measured horizontally from the ledge) would the car travel during flight? a) 43 m b) 54 m c) 79 m d) 60 m e) 102 How much total kinetic energy would the car have just before it landed on the truck? a) 703 kJ b) 411 kJ c) 302 kJ d) 108 kJ e) 545 kJ Just before landing on the truck, what would be the speed of the car? a) 28.7 m/s b) 33.1 m/s c) 35.6 m/s d) 37.7 m/s e) 24.4 m/s Assume that when the car lands on the stunt truck (2500 kg), it locks on to the truck and delivers all of its momentum to the truck. If the truck was initially at rest, how fast will the truck-with-car be moving after the car lands? a) 8.8 m/s b) 7.5 m/s c) 11.5 m/s d) 10.1 m/s e) 13.4 m/s. The duration of the impact of the car landing on the truck is 0.8 s. What is the average force of the stunt car exerted on the truck? a) 23.2 kN b) 31.6 kN c) 27.4 kN

Explanation / Answer

radial acceleration ar=v2/r

=30*30/170=5.29m/s2

so the radial acceleration is 5.3 m/s2

Option E

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