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11Alexandr11 [23.1K]
3 years ago
7

A car moving south speeds up from 10 m/s to 40 m/s in 15 seconds. What is the car's acceleration?

Physics
1 answer:
ElenaW [278]3 years ago
7 0

Answer: 2m/s^{2}

Explanation:

Assuming the car is moving only in one direction (to the South), its acceleration a is given by the following formula, which expresses the variation of the velocity in time:

a=\frac{\Delta V}{\Delta t}   (1)

Where:

\Delta V=V_{2}-V_{1}=40m/s-10m/s=30m/s   is the variation in velocity

\Delta t=t_{2}-t_{1}=15s-0s=15s is the variation in time

Rewritting (1) with the calculated values:

a=\frac{30m/s}{15s}   (2)

a=2m/s^{2}  This is the acceleration of the car

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