Question

8 A car accelerates at a rate of 10m/s

for a time of 4s and it reaches a speed of 52m/s . calculate the initial value
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Answer 1

From the First Law of Motion

Vf = Vi + at

"It reaches a speed of 52m/s" meaning the Final speed Vf=52

a(acceleration)=10m/s²

t=4s

Applying the formula

52=Vi + 10(4)

Vi = 52-40

Vi = 12m/s