157-75 = 82 km/hr = 22.78 m/s
-22.78m/s
----------- = 3.25 s
-7.00 m/s^2
so, now just use your motion formula.
157 km/hr = 43.61 m/s, so
s = Vo t + 1/2 at^2
and plug in your numbers.
A race car moving at 157km/hr decelerates at -7.00 m/s^2 to a speed of 75.0km/hr
A) how long did this take?
B) how many meters did the car travel during this deceleration?
I attempted this problem many times and i don't seem to get the correct answer please show all work thank you
1 answer
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