. A bus starting from rest moves with a uniform acceleration of


0.1 ms-2 for 2 minutes. Find:

(a) The speed acquired.

(b) The distance travelled.

 

Best Answer

Ans. (a) The speed acquired:

Given,

Initial speed, u = 0 (As it starts from rest)

Final speed, v =?

Acceleration, a = 0.1 m/s2

Time, t = 2 minutes

 = 2 × 60 seconds

 = 120 s

Final velocity, v = 0 + 0.1 × 120

 = 12 m/s

 Therefore, the speed acquired by the bus is 12 m/s

(b) The distance travelled:

 We know that,

Distance travelled, s = ut + at2

 = 0 × 120 + × 0.1 × (120)2

 = 0 + × 0.1 × 14400

 = 720 m

 Therefore, the distance travelled by the bus is 720 metres

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