Question

A car accquries a velocity of 72 km per HR in 10 sec starting from rest .find acceleration and average velocity travelled in this time

Answer 1

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Answer 2

Answer:

Acceleration = 2m/s^2

Average velocity = 10m/s

Explanation:

Given

u = 0

v = 72km/hr = 20m/s

t = 10s

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When u = initial velocity, v = final velocity and t = time

Acceleration (a) = $\frac{(v-u)}{t}$

                           = $\frac{20-0}{10} = \frac{20}{10} = 2m/s^2$

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Average velocity = $\frac{(v+u)}{2}=\frac{20+0}{2} = \frac{20}{2} = 10m/s$