Question
A bus decreases its speed from 80 kmph to 60 kmph in 5 seconds. Find the acceleration of the bus.
Answer: Option C
:
C
Initial speed, u=80 kmph = 80×100060×60=80036 ms−1
Final speed, v=60 kmph = 60×100060×60=60036 ms−1
Time taken t=5 s
From the first equation of motion,
a=v−ut =600−80036×5=−1.11 ms−2.
Here sign of acceleration is negative which shows that the speed is decreasing and acceleration is in the opposite direction of the motion.
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:
C
Initial speed, u=80 kmph = 80×100060×60=80036 ms−1
Final speed, v=60 kmph = 60×100060×60=60036 ms−1
Time taken t=5 s
From the first equation of motion,
a=v−ut =600−80036×5=−1.11 ms−2.
Here sign of acceleration is negative which shows that the speed is decreasing and acceleration is in the opposite direction of the motion.
Was this answer helpful ?
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