Question

 A car increases its speed from 20 km/h to 40 km/h in 15 sec .Its acceleration is :​

Answer 1

Answer:

Acceleration=v-u/t

= 40-20/15

=20/15

=4/3 m/s²

= 1.33 m/s²

Explanation:

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Answer 2

Answer:

$\frac{5}{9}m/s^{2}$

Explanation:

Acceleration is change in velocity per unit time

a=$\frac{v_{2}-v_{1} }{t_{2}-t_{1} }$

$v_{2}-v_{1} = 30kmph=30*(5/18)m/s\\=\frac{25}{3}m/s\\ t_{2}-t_{1}= 15\\ a=\frac{25}{3*15}=\frac{5}{9}m/s^{2}$

Extra:

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