An out-of-control F-Liner bus having a speed of 120 kilometer per hour (kph) is made to stop in 0.02 hour. What is the acceleration causes it to stop?
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Given:
The initial speed of the F-liner bus = 120 km/hr
The time taken to stop the F-liner bus = 0.02 hours.
To find:
The acceleration to stop the bus.
Solution:
Initial velocity of bus u = 120 km/hr
Final velocity v = 0 km/hr
Acceleration = -a
Time taken = 0.02 hr
Then using the relation: v= u + at
0 = 120 - a*0.02
0.02a = 120
a = 120/ 0.02
a = 6000 km/hr²
Therefore the acceleration required to stop the bus will be in opposite direction and its magnitude will be 6000 km/hr².
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