Brake Requirement Each vehicle must be equipped with a brake system which is cap

Question

Brake Requirement
Each vehicle must be equipped with a brake system which is capable of stopping the vehicle containing any team driver within 4.0 meters (13.12 feet) in a reasonably straight line when traveling at 24kph ( 15mph).
B7.2 Brake Actuator Location
The brake actuator must be mounted to the interior of the vehicle. The brake actuator may not be mounted to any body panel. The driver must have access to the brake actuator at all times.
B7.3 Brake Test
The brake system will be tested to determine if it is capable of decelerating the vehicle from 24 kph (15 mph) at a rate greater than 0.25 g (gravity). Brake system performance will be evaluated at Technical Inspection using the course shown in Figure 5.
a) Acceleration zone: There will be a minimum of 50m (164 feet) available for the vehicle to accelerate to a minimum speed of 16 kph (10mph).
b) Coast zone: The vehicle must traverse the coast zone in less than 1.5 seconds. c) Brake zone: The vehicle must come to a complete stop within the brake zone.


QUESTION:
If the achieved speed at coast is 15 mph, determine
a)Acceleration zone: The acceleration in multiples of g (gravity).

Explanation / Answer

initial velocity v = 10 mph = 16 kph = 16/3.6 m/s final velocity v' = 15 mph = 24 kph = 24/3.6 m/s time t = 1.5 s acceleration a = (v' - v)/s = 1.48 m/s^2 = 0.15g

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