Question

The speed of a car has increased from 25 km/h to 40 km/h in one minute. Find its acceleration

Answer 1

Step-by-step explanation:

acceleration= v-u/t

v-u= 40-25=15km/hr

km/hr to m/s = ×5/18

15×5/18=4.16

a= 4.16/60= 0.0693

Answer 2

The given question is The speed of a car has increased from 25 km/h to 40 km/h in one minute

The final velocity is v and the initial velocity is u

v=40 km/h and the u= 25 km/hr.

The time taken is 1 minute.

Therefore, ghe formula to find the acceleration is

$\frac{v - u}{t}$

$40 - 25 = 15km \: per \: hour$

in order to convert the km/hr to m/s we have to multiply by 5/18.

$15 \times \frac{5}{18} = \frac{25}{6} = 4.16$

The time taken is 1 min which is 60 seconds.

$\frac{4.16}{60} = 0.06933 \frac{m}{s}$

Therefore the final answer is 0.069333 meter per second.

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