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snoopy g
snoopy g asked in Science & MathematicsPhysics · 1 decade ago

physics question help please?

What is the acceleration of a vehicle that changes its velocity from 90 km/h to a dead stop in 13 s?

in a problem like this wouldn't you just you the formula

A= (Vi-Vf)/T

i used that with a final velocity of 0 and the answer i got was wrong

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  • Technobuff
    Lv 7
    1 decade ago
    Favorite Answer

    90kph = 90,000/3600 metres/sec., = 25 m/sec.

    In a time of 13 secs., that's an acceleration of 1.923 m/sec. average.

  • Goat
    Lv 4
    1 decade ago

    you need to convert km/hr into m/s

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