Question

A car accelerates at a rate of 10m/s2 for a time of 4s. It reaches a speed of 52 m/s. Calculate its initial speed.

Answer 1

Answer:

your answer is in the attachment

Answer 2

$\mathtt{ \huge{ \fbox{Solution :)}}}$

Given ,

• Acceleration (a) = 10 m/s²
• Time (t) = 4 sec
• Final velocity (v) = 52 m/s

We know that , the rate of change of velocity is called acceleration

$\large \mathtt{ \fbox{Acceleration \: (a) = \frac{v - u}{t} }}$

Thus ,

10 = (52 - u)/4

40 = 52 - u

u = 52 - 40

u = 12 m/s

Hence , the inital velocity is 12 m/s

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