Question

A car accelerates from 0 to 72 km/ hour in 8 sec. what is the cars acceleration?

Answer 1

Explanation:

Initial Velocity (u) = o m/s

Final Velocity (V) =(72*1000)/1*60*60 m/s

= 20m/s

time (t) =8 sec

Acceleration(a)= v-u /t

=(20-0)/8

=2.5 m/s^2

Answer 2

The cars acceleration will be "2.5 m/s²".

According to the question,

• Initial velocity, u = 0 m/s
• Time, t = 8 sec

Now,

Final velocity,

→ $v = \frac{72\times 1000}{1\times 60\times 60}$

     $= 20 \ m/s$

hence,

The acceleration,

→ $a = \frac{v-u}{t}$

By substituting the values,

     $= \frac{20-0}{8}$

     $= \frac{20}{8}$

     $= 2.5 \ m/s^2$

Thus the answer above is correct.

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