A bus starting from rest moves with a uniform acceleration of 0.1ms –2 for 2 minutes. Find (a) the speed acquired,

Question

A bus starting from rest moves with a uniform acceleration of 0.1ms –2 for 2 minutes. Find (a) the speed acquired,

A bus starting from rest moves with a uniform acceleration of 0.1ms ^–2 for 2 minutes. Find

(a) the speed acquired,

(b) the distance travelled.

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Salim Ahmed Kawsar · Answer 1 · Feb 05, 2023 15:29:48

Acceleration (a)=0.1ms-2
Time (t)=120seconds
W k t,
a) distance
       S = ut+1/2 a t2
          = 0+1/2 x 0.1 x 14400 = 720 m
b) speed = distance/ time
                  = 720 / 120
                  = 6 ms-1
In this solved problem the speed is wright or wrong.... If it is wrong means how??
     Here I am confused...

Salim Ahmed Kawsar · Answer 2 · Feb 05, 2023 15:29:48

Answer 1:

Here we have,

Initial velocity (u) = 0 m/s

Acceleration (a) = 0.1ms^–2

Time (t) = 2 minute = 120 seconds

(a) The speed acquired:

We know that, v = u + at

⇒ v = 0 + 0.1 × 120 m/s

⇒ v = 12 m/s

Thus, the bus will acquire a speed of 12 m/s after 2 minute with the given acceleration.

(b) The distance travelled:

We know that, s = ut + 1/ 2 at2

= 0 × 120 + 1 /2 × 0.1 × (120)²

= 1/ 2 × 0.1 ×14400 m = 720 m

Thus, bus will travel a distance of 720 m in the given time of 2 minute.

A bus starting from rest moves with a uniform acceleration of 0.1ms –2 for 2 minutes. Find (a) the speed acquired,

2 Answers