## anonymous one year ago When a race begins, a racecar accelerates from zero to 200 km/h in 4.80 seconds. What is its average acceleration?

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1. anonymous

Shouldn't This Be A Math Question?

2. anonymous

roughly 12 m/s²

3. Michele_Laino

by definition, the average acceleration A is: $\Large A = \frac{{\Delta v}}{{\Delta t}} = \frac{{200 \cdot 3.6}}{{4.8}} = ...\frac{{meters}}{{{{\sec }^2}}}$ please 200 Km/hour correspond to 200*3.6 m/seconds

4. kropot72

200 km/h corresponds to $\large \frac{200}{3.6}\ m/s$

5. Michele_Laino

oops.. you are right! @kropot72 thanks! for your comment :) I'm very sorry for my error @Joshdaddy here is the right computation: $\Large\frac{{\Delta v}}{{\Delta t}} = \frac{{200/3.6}}{{4.8}} = ...\frac{{meters}}{{{{\sec }^2}}}$

6. kropot72

@Michele_Laino You're welcome :)

7. Michele_Laino

thanks! :)