Question

22. A bus increases its speed from 40 km/h to 80 km/h in 4 s. Find the
acceleration of the bus.​

Answer 1

Answer:

10m/s is the answer.

a=v-u/t

so,80-40/4=10

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Answer 2

The Acceleration Of The Bus Is 36ms⁻²

Given

The initial velocity of the bus = 40 km/h

the final velocity of the bus = 80 km/h

Time is taken = 4 sec

TO FIND

Acceleration. of the bus

SOLUTION

We can simply solve the problem as follows-

We are given,

$the \: initial \: velocity \: u \: = 40 \times \frac{18}{5} = 144m {s}^{ - 1}$

$final \: velocity \: = 80 \times \frac{18}{5} = 288m {s}^{ - 1}$

Time taken, t = 4 sec.

To calculate the acceleration of the bus, we will apply the first equation of motion, which is as follows -

$v \: = u \: + at$

Putting the values in the above equation we get -

$288 = 144 + 4a$

$a = \frac{144}{4} = 36m {s}^{ - 2}$

Hence, the acceleration of the bus is 36ms⁻²

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