what is the speed of a car with acceleration of 6km/h after 10min
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Class 11
>>Physics
>>Motion in a Straight Line
>>Distance and Displacement
>>A car accelerates from 6 ms^-1 to 16 ms^
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A car accelerates from 6ms
−1
to 16ms
−1
in 10 sec. Calculate (a) the acceleration and (b) the distance covered by the car in that time.
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Solution
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Initial velocity = u
u=6m/s
Final velocity = v
v=16m/s
Time=t=10s
⋅Acceleration=a
a=(v−u)/t
=(16−6)/10
=1m/s
2
⋅Distance=s
From the newton's second law,
s=
2a
(v
2
−u
2
)
s=
(2×1)
(256−36)
=110m
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