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A bus starting from rest moves with a uniform acceleration of
?
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A bus starting from rest moves with a uniform acceleration of Related...
Initial speed of the bus, u= 0

Acceleration, a = 0.1 m s-2

Time taken, t = 2 minutes =2 � 60 s =  120 s

Speed acquired, v = ?

Distance travelled, s = ?

(a) v= u + at

     v = 0 + 0.1 � 120

     v  = 12 m s–1

Thus, speed acquired by the bus is 12 m s-1.

(b) According to the equation of motion:

     v2 = u2+ 2as

     v2 - u2= 2as     [where, s is the distance covered by the bus]

    (12)2 - (0)2= 2(0.1) s

    144 = 0.2 s

    s = 144 / 0.2

   begin mathsize 14px style therefore end styles = 720 m = 7.2 � 102 m
Thus, distance travelled by the bus is 720 m.
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A bus starting from rest moves with a uniform acceleration of Related: Describing Motion?
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